As a general guideline, the research hypothesis should be stated as the:.

Answers

Answer 1

As a general guideline, the research hypothesis should be stated as the alternative hypothesis, which is the statement that researchers are trying to support or prove.

The research hypothesis is a statement that describes the expected relationship between variables or the expected difference between groups in a research study. It should be based on a clear and specific research question, and it should be testable using appropriate statistical methods.

In other words, the research hypothesis should be a clear and concise statement that proposes a relationship or difference between variables that can be tested through data analysis. It should also be framed in a way that allows for the rejection or acceptance of the hypothesis based on the results of the study.

The null hypothesis, on the other hand, is the statement that there is no significant relationship or difference between variables. It serves as the default assumption until evidence is provided to support the alternative hypothesis.

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Answer 2
Final answer:

A research hypothesis should be stated as the predicted outcome of the study. It's often a declarative sentence that shows the relationship between variables in a study. The research hypothesis is often contrasted with a null hypothesis, which claims no significant relationship between the study's variables.

Explanation:A Research Hypothesis

In general, a research hypothesis should be stated as the predicted outcome of the study. A research hypothesis is usually written in a declarative sentence format and states the relationship between variables in the study. For example, if your research is about studying the impact of amount of study time on test scores, your hypothesis could be: 'Students who spend more time studying will have higher test scores.'

The research hypothesis is often contrasted with a null hypothesis, which states there will be no significant relationship between the study's variables. In our example, the null hypothesis would be: 'The amount of study time will not impact the test scores significantly.' Remember, a research hypothesis should always be testable through research methods.

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Related Questions

If two fair dice are rolled, what is the probability that the total showing is either even or less than five? 5.
these are the choices:
a. 5/9
b. 17/36
c. 19/36
d. 11/18​

Answers

If two fair dice are rolled, the probability that the total showing is either even or less than five is 17/36. The correct answer is B.

There are 36 possible outcomes when rolling two dice, since each die has 6 possible outcomes.

To find the probability that the total showing is either even or less than five, we can first find the probability that the total showing is even, and then add to that the probability that the total showing is less than five, excluding the outcomes where the total showing is even.

To find the probability that the total showing is even, we can consider the following possibilities:

both dice show even numbers (probability 1/4)

both dice show odd numbers (probability 1/4)

So the probability of rolling an even total is 1/4 + 1/4 = 1/2.

To find the probability that the total showing is less than five, excluding the outcomes where the total showing is even, we can consider the following possibilities:

the two dice show 1 and 1 (probability 1/36)the two dice show 1 and 2 (probability 1/18)the two dice show 2 and 1 (probability 1/18)the two dice show 1 and 3 (probability 1/12)the two dice show 3 and 1 (probability 1/12)the two dice show 2 and 2 (probability 1/9)the two dice show 1 and 4 (probability 1/9)the two dice show 4 and 1 (probability 1/9)the two dice show 3 and 2 (probability 1/6)the two dice show 2 and 3 (probability 1/6)the two dice show 1 and 5 (probability 1/6)the two dice show 5 and 1 (probability 1/6)the two dice show 4 and 2 (probability 1/6)the two dice show 2 and 4 (probability 1/6)

So the probability of rolling a total less than five, excluding the outcomes where the total showing is even, is 1/36 + 1/18 + 1/18 + 1/12 + 1/12 + 1/9 + 1/9 + 1/9 + 1/6 + 1/6 + 1/6 + 1/6 + 1/6 + 1/6 = 11/36.

Therefore, the probability that the total showing is either even or less than five is 1/2 + 11/36 = 17/36.

So the correct answer is (b) 17/36.

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RO Consider the convergent series (-1)" its sum s, and its partial sums n+1 84. That is, (-1)" and 8μ -Σ (-1)" n+1 RO NO 1. Is s - 85 going to be positive or negative? 2. Use the Alternating Series

Answers

The value of s - 85 cannot be determined based on the given information as we do not know the value of s.

Alternating Series Test states that if a series satisfies three conditions, namely the terms alternate in sign, the absolute value of the terms decreases as n increases, and the limit of the terms approaches zero as n approaches infinity, then the series converges.

The given series (-1)^n satisfies the first two conditions as the terms alternate in sign and the absolute value of the terms is decreasing. To check the third condition, we take the limit of the terms as n approaches infinity: lim n→∞ |(-1)^n+1/n+1| = lim n→∞ 1/(n+1) = 0.

Since all three conditions are satisfied, the series converges. We can also see from the given partial sums that the sum s lies between 83 and 85. Therefore, s - 85 is negative or zero.

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All juniors and seniors at a high school were surveyed about whether they had ever had a summer job. This graph shows the data from the survey. PART A Based on the graph, what is the total number of students who were surveyed?

Answers

The total number of students who were surveyed is 575

The graph likely displays a horizontal axis and a vertical axis.

In this graph, the horizontal axis may indicate two categories, such as "juniors" and "seniors," and the vertical axis shows the number of students in each category who responded "yes," "no," or "not sure."

To find the total number of students surveyed, we need to look for the bar that represents the entire group of juniors and seniors. Typically, this bar will be labeled as "total," "all," or something similar. Once we locate this bar, we can add up the number of students represented by the bar. The value will be displayed on the vertical axis, and it should correspond to the sum of the bars for juniors and seniors separately.

=> 100 + 200 + 125 + 150 = 575

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The first is kept by the albatross, which first lands in our region. The second occurs every night in shooting, swimming, fighting, singing and others. Separately, they would reveal many to you. Together, they will reveal only one to you. And whose one is it?

Answers

Based on the information provided, it is not clear what "they" refer to. However, it seems that there are two distinct events or phenomena being described here.

The first involves the albatross, which is known to be a migratory bird that visits certain regions at certain times of the year. It is unclear what exactly is being "kept" by the albatross, but it could be some sort of information or knowledge that is unique to this bird.

The second event or phenomenon is described as happening every night and involving various activities such as shooting, swimming, fighting, and singing.

It is unclear what this refers to exactly, but it could be some sort of nightly ritual or tradition that takes place in a particular community or region.

The statement that "separately, they would reveal many to you" suggests that each of these phenomena has its own unique insights or knowledge to offer.

However, the statement that "together, they will reveal only one to you" implies that there is some sort of deeper connection or meaning between these two events that is not immediately apparent.

The question of "whose one is it?" suggests that there is some sort of ownership or responsibility associated with this revelation.

It is unclear who this refers to, but it could be interpreted as asking who is responsible for uncovering the deeper meaning or connection between these two phenomena.

In summary, the information provided is somewhat cryptic and open to interpretation. However, it seems that there are two distinct events or phenomena being described, and that there is some sort of deeper connection or meaning between them that is not immediately apparent.

The question of who is responsible for uncovering this connection remains unanswered.

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Lucy’s dog weighs nine and seventy-five hundredths kilograms. what is the weight, in kilograms, of lucy’s dog written in expanded notation?

Answers

The weight of Lucy's dog, written in expanded notation, is 9 kilograms and 0.75 kilograms.

Expanded notation is a way of writing a number as the sum of each digit multiplied by its place value. In this case, the number is 9.75. The digit 9 is in the tens place, so it represents 9 tens or 90. The digit 7 is in the ones place, so it represents 7 ones or 7.

The digit 5 is in the tenths place, so it represents 5 tenths or 0.5. The digit 7 is in the hundredths place, so it represents 7 hundredths or 0.07. Therefore, the weight of Lucy's dog in expanded notation is 90 kilograms plus 7 kilograms plus 0.5 kilograms plus 0.07 kilograms, which simplifies to 9 kilograms and 0.75 kilograms.

Mathematically, we can represent the given number as 9.75 = 9 x 10 + 7 x 1 + 5 x 0.1 + 7 x 0.01 = 90 + 7 + 0.5 + 0.07 = 9.57. Thus, the weight of Lucy's dog written in expanded notation is 9 kilograms and 0.75 kilograms.

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You are choosing between two different cheese wedges at the grocery store. Assume both


wedges are triangular prisms with bases that are isosceles triangles. The first wedge has a base


that is 2. 5 in. Wide and a height of 4. 5 in. , with the entire wedge being 3 in thick. The second


wedge has a base that is 3 in, wide and a height of 4 in. , with the entire wedge being 3. 5 in.


thick. Which wedge has a greater volume of cheese, and by how much?


The first wedge by 6. 375 cubic inches


The first wedge by 12. 75 cubic inches


The second wedge by 8. 25 cubic inches


The second wedge by 4. 125 cubic inches

Answers

The second wedge has a greater volume by 4.125 cubic inches. Therefore, the correct option is 4.

To determine which cheese wedge has a greater volume, you need to calculate the volume of each triangular prism using the given dimensions.

For the first wedge:

1. Calculate the area of the base (isosceles triangle):

(base x height) / 2 = (2.5 in x 4.5 in) / 2 = 5.625 square inches

2. Calculate the volume of the prism:

base area x thickness = 5.625 sq in x 3 in = 16.875 cubic inches

For the second wedge:

1. Calculate the area of the base (isosceles triangle):

(base x height) / 2 = (3 in x 4 in) / 2 = 6 square inches

2. Calculate the volume of the prism:

base area x thickness = 6 sq in x 3.5 in = 21 cubic inches

To find which wedge has a greater volume and by how much, subtract the smaller volume from the larger volume:

21 cu in - 16.875 cu in = 4.125 cu in.

Therefore, the correct answer is option 4: The second wedge has a greater volume by 4.125 cubic inches.

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Given the exponential model y= 200(.80)^x, tell whether the model represents exponential growth or decay. What is the growth/decay factor? A. Growth: (0.80) B. Decay: (200) C. Growth: (200) D. Growth: (0.80)

Answers

The growth/decay factor is the base of the exponent, which is 0.80 in this case. The factor is less than 1, indicating that the output (y) decreases as the input (x) increases.

what is exponent ?

In mathematics, an exponent (also known as a power or index) is a number that indicates how many times a given number (the base) must be multiplied by itself.

In the given question,

The given exponential model is:

y = 200(0.80)ˣ

where:

y is the output (dependent variable)

x is the input (independent variable)

To determine whether the model represents exponential growth or decay, we need to examine the base of the exponent, which is 0.80 in this case.

If the base is greater than 1, then the model represents exponential growth, and if the base is between 0 and 1, then the model represents exponential decay.

In this case, the base of the exponent is 0.80, which is between 0 and 1. Therefore, the model represents exponential decay.

The growth/decay factor is the base of the exponent, which is 0.80 in this case. The factor is less than 1, indicating that the output (y) decreases as the input (x) increases. The factor represents the rate of decay per unit of the independent variable, which in this case is 0.80.

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Jamal winchester invested 75,000 in to a property. He expects his annual expenses to be 18,000. If Jamal wants to earn 8% annual income on his capital investment, what monthly rent must he charge?​

Answers

Jamal must charge a monthly rent of 2,000 to earn an 8% annual income on his capital investment.

It is given that Jamal Winchester invested 75,000 in to a property and he expects his annual expenses to be 18,000. Jamal wants to earn 8% annual income on his capital investment. Hence, the monthly rent he must charge is determined as follows.

1. Calculate the desired annual income:

75,000 (capital investment) x 0.08 (8% annual income) = 6,000.

2. Add the annual expenses:

6,000 (desired annual income) + 18,000 (annual expenses) = 24,000.

3. Divide by 12 months to find the monthly rent: 24,000 ÷ 12 = 2,000.

Jamal must charge a monthly rent of 2,000.

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Pls respond quick | what is the value of the expression? c711

a)330


b)1,663,200


c)5040


d)7920

Answers

The value of the expression 11C7 is 330. This can be calculated using the formula for combinations, which is nCr = n!/r!(n-r)!, where n is the total number of objects and r is the number of objects being selected. So, the correct answer is A).

To calculate the value of the expression 11C7, we need to use the formula for combinations or binomial coefficients, which is

nCr = n! / (r! * (n-r)!)

where n is the total number of items, r is the number of items to be chosen, and ! denotes the factorial operation (the product of all positive integers up to n).

In this case, we have

n = 11 and r = 7

So, we can substitute these values into the formula

11C7 = 11! / (7! * (11-7)!)

= 11! / (7! * 4!)

= (11 * 10 * 9 * 8 * 7 * 6 * 5) / (4 * 3 * 2 * 1)

= 330

Therefore, the value of the expression 11C7 is 330. So, the correct answer is A).

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--The given question is incomplete, the complete question is given

"Pls respond quick | what is the value of the expression? ₁₁C₇

a)330

b)1,663,200

c)5040

d)7920"--

The seventh-grade class is selling boxes of votive candles as a fundraiser. The first box purchased costs $14. 00, and each additional box costs $10. 0.


a. Is the relationship between the number of additional boxes of candles purchased and the total money spent linear?explain


b. An equation that relates the total money spent on boxes of candles, C, to the number of additional boxes purchased,b,is,


c. Using the equation from part (b), the total money spent by a person who bought 3 boxes of candles for the fundraiser would be $

Answers

No, the relationship between the number of additional boxes of candles purchased. C = 14.00 + 10.00b. The person would spend $34.00 on 3 boxes of candles.

a. No, the relationship between the number of additional boxes of candles purchased and the total money spent is not linear. This is because the cost of the first box is $14.00 and the cost of each additional box is $10.00.

A linear relationship implies that the change in the dependent variable (total money spent) is proportional to the change in the independent variable (number of additional boxes purchased), but in this case, the cost does not change at a constant rate.

b. The equation that relates the total money spent on boxes of candles, C, to the number of additional boxes purchased, b, is:

C = 14.00 + 10.00b

This equation takes into account the cost of the first box, which is $14.00, and the cost of each additional box, which is $10.00.

c. If someone buys 3 boxes of candles, they are purchasing 2 additional boxes (since the first box is already included in the $14.00). Using the equation from part (b), the total money spent by a person who bought 3 boxes of candles for the fundraiser would be:

C = 14.00 + 10.00(2) = $34.00

Therefore, the person would spend $34.00 on 3 boxes of candles.

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The diagonals of quadrilateral ABCD intersect at E(0,2). ABCD has vertices at A(1,6) and B(-2,4). What must be the coordinates of C and D to ensure that ABCD is
a parallelogram?

Answers

Answer:

  C = (-1, -2)

  D = (2, 0)

Step-by-step explanation:

You want the coordinates of points C and D in parallelogram ABCD such that point E(0, 2) is the intersection of the diagonals. Given points are A(1, 6) and B(-2, 4).

Parallelogram

The diagonals of a parallelogram bisect each other. This means the point of intersection of the diagonals is the midpoint of each:

  E = (A +C)/2 . . . . . . . . . . . . . . . E is the midpoint of AC

  C = 2E -A = 2(0, 2) -(1, 6)

  C = (-1, -2)

and

  D = 2E -B = 2(0, 2) -(-2, 4) . . . . . using the same pattern

  D = (2, 0)

You rent an apartment that costs $1600$1600 per month during the first year, but the rent is set to go up 12.5% per year. What would be the rent of the apartment during the 10th year of living in the apartment? Round to the nearest tenth (if necessary).

Answers

The rent of the apartment during the 10th year of living in the apartment would be $4940.79

To solve the problem, we need to use the formula for compound interest:

A = P * (1 + r/n)^(n*t)

where:

A is the final amount

P is the initial principal

r is the annual interest rate (as a decimal)

n is the number of times the interest is compounded per year

t is the number of years

In this case, the "principal" is the initial rent of $1600 per month, and the "interest rate" is the 12.5% increase per year. We want to find out the rent during the 10th year, so t = 10.

Let's plug in the values and solve for A:

A = 1600 * (1 + 0.125/12)^(12*10)

A = 1600 * (1.01042)^120

A = 1600 * 3.086

A = 4940.79

So the rent during the 10th year would be $4940.79 per month, rounded to the nearest tenth.

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Consider the following function f(x)=x^2+5


part a write a function in vertex form that shifts f(x) right 3 units


part b write a function in vertex form that shifts f(x) left 10 unites

Answers

Part a: f(x) = (x-3)^2 + 5

Part b: f(x) = (x+10)^2 + 5

Part a: To shift the function f(x) = x^2 + 5 right 3 units, we need to subtract 3 from the x-coordinate of the vertex. The vertex form of a quadratic function is given by f(x) = a(x-h)^2 + k, where (h,k) is the vertex. Thus, the function in vertex form that shifts f(x) right 3 units is:

f(x) = (x-3)^2 + 5

Part b: To shift the function f(x) = x^2 + 5 left 10 units, we need to add 10 to the x-coordinate of the vertex. Using the same vertex form as before, the function in vertex form that shifts f(x) left 10 units is:

f(x) = (x+10)^2 + 5

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How can I figure this out?

Answers

Answer:

Blue = 4

Red = 24

Green = 4

All = 32

Step-by-step explanation:

Area of a triangle: 1/2 * base * height, so for both blue and green:

1/2 * 2 * 4

1 * 4

4

Area of an object with 4 sides: length * width, so for red:

6 * 4

24

Area of everything: blue + red + green, so for all:

4 + 4 + 24

8 + 24

32

Solve for x, t, r and round to the nearest hundredth

Answers

Answer:

x = 14°

t = 12.367 ~ 12.4

r = 2.999 ~ 3

Step-by-step explanation:

1st we can find x by sum theory which is the sum of all side equal to 180° .

x + 90° + 76° = 180 °

x + 166° = 180°

x= 180° - 166°

x = 14° ... So the unknown angle is 14°

and we also can solve hypotenus t and adjecent r by using sin amd cos respectively by angle 76° .

sin(76) = 12/t

sin(76) t = 12 ....... criss cross it

t = 12 / sin(76) ....... divided both side by sin(76)

t = 12.367 ~ 12.4 ....... result

And

cos(76) = r / 12.4

r = cos(76) × 12.4 .......criss cross

r = 2.999 ~ 3 ....... amswer and i approximate it

What is the value of x?

round to the nearest tenth, if necessary.

x = 6

x = 11

x = 11.5

x = 13.6

right triangle a b c with right angle b. side b c is 8 units long. side a c is 14 units long. side a b is x units long.

Answers

Using the Pythagorean theorem, the value of x, rounded to the nearest tenth, is 11.5 units.

In the given right triangle ABC with right angle B, you are given the lengths of sides BC (8 units) and AC (14 units). You are asked to find the length of side AB (x units). To do this, you can use the Pythagorean theorem, which states that the square of the hypotenuse (AC) is equal to the sum of the squares of the other two sides (AB and BC).

So, the equation for this triangle is:

AC² = AB² + BC²

Plug in the given values:

14² = x² + 8²

196 = x² + 64

Subtract 64 from both sides:

132 = x²

Now, find the square root of 132:

x ≈ 11.5

So, the value of x, rounded to the nearest tenth, is 11.5 units.

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What kind of triangle is this?

A. Equilateral

B. Isosceles but not equilateral

C. Scalene

Answers

C. Scalene because all 3 sides are different lengths

Answer:

C. Scalene

Step-by-step explanation:

Equilateral triangle has all sides equal.

Isosceles triangle has exactly 2 sides equal.

All side lengths in a Scalene triangle are distinct.

find the perimeter of the equilateral triangle whose area is 16root3/4

Answers

The perimeter of this equilateral triangle is equal to 12 units.

How to calculate the area of an equilateral triangle?

In Mathematics and Geometry, the area of an equilateral triangle can be calculated by using this formula:

Area of an equilateral triangle, A = √3/4 × a²

Where:

a represent the side lengths of an equilateral triangle.

By substituting the given parameters or dimensions into the formula for the area of an equilateral triangle, we have the following;

16 √3/4 = √3/4 × a²

a² = 16

a = 4 units.

In Mathematics and Geometry, the perimeter of an equilateral triangle can be calculated by using this mathematical equation:

Perimeter of an equilateral triangle, P = 3a

Perimeter of an equilateral triangle, P = 3(4)

Perimeter of an equilateral triangle, P = 12 units.

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Dagne measures and finds that she can do a vertical jump that is 27. 5% of her height. If Dagne is 48 inches tall, how high can she jump? Enter your answer in the box

Answers

If Dagne is 48 inches tall, then she can jump 13.2 inches high.

Given that Dagne can do a vertical jump that is 27.5% of her height, and she is 48 inches tall, we can find how high she can jump by multiplying her height by the percentage of her vertical jump as follows:

Jump height = 27.5% of height

Jump height = (27.5/100) x 48 inches

Jump height = 0.275 x 48 inches

Jump height = 13.2 inches

Therefore, Dagne can jump 13.2 inches high.

To explain this, we can say that the problem gives us information about the proportion of Dagne's height that she can jump vertically. The percentage of her height that she can jump is given as 27.5%, which we can convert to a decimal form (0.275) for calculation purposes. Multiplying this decimal by Dagne's height of 48 inches gives us the height that she can jump, which is 13.2 inches. So, Dagne can jump 13.2 inches high based on the given information.

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Your friends, Fernando and Amelia, each own a video game designer company. They both want you to join their company. You currently have a part-time job making $8. 00 per hour. Fernando offers to pay you $15 per hour for the first month and then increase your hourly rate by $1. 00 each month. Amelia says she will start your pay at $8. 00 per hour but she will increase your hourly rate by 10% each month. In order to make the best decision, you decide to use the mathematics to choose the best offer based on the best hourly wage per month.



Write the equations to represent Fernando’s job offer and Amelia’s job offer. Let x = number of months, y = hourly wage.



Under what time period would you accept Fernando’s offer? Use mathematics to support your reasoning.



Under what time period would you prefer Amelia’s offer? Use mathematics to support your reasoning.



Now that we have looked at the different figures for Fernando and Amelia, which job would you take for the long run? Use mathematics to justify your answer

Answers

Answer:

The equation to represent Fernando's job offer is:

y = 15 + x

Where y is the hourly wage and x is the number of months worked.

The equation to represent Amelia's job offer is:

y = 8(1 + 0.1)^x

Where y is the hourly wage and x is the number of months worked.

To determine the time period for which Fernando's offer is better, we need to find the point where his hourly wage is greater than Amelia's. We can set the two equations equal to each other and solve for x:

15 + x = 8(1 + 0.1)^x

15 + x = 8(1.1)^x

x ≈ 20.44

Therefore, Fernando's offer is better for any time period greater than 20.44 months.

To determine the time period for which Amelia's offer is better, we need to find the point where her hourly wage is greater than Fernando's. We can set the two equations equal to each other and solve for x:

8(1 + 0.1)^x = 15 + x

8(1.1)^x = 15 + x

x ≈ 14.45

Therefore, Amelia's offer is better for any time period less than 14.45 months.

For the long run, we need to determine which offer has a higher hourly wage after a certain number of months. We can compare the two equations by finding their limits as x approaches infinity:

lim (y = 15 + x) as x → ∞ = ∞

lim (y = 8(1 + 0.1)^x) as x → ∞ = ∞

Therefore, both offers have the same long-term hourly wage of infinity. However, Fernando's offer has a faster rate of increase, so it may be more beneficial in the long run.

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75°(4x+7)° find x

(2x+10)°

(2x-10)° FIND X

Answers

The value of x using the assumptions of angle are 17 and 22.5

Finding the value of x

From the question, we have the following parameters that can be used in our computation:

Angles: 75° and (4x + 7)°

Angles: (2x+10)° and (2x - 10)°

Assume 75° and (4x + 7)° are congruent angles, we have

4x + 7 = 75

So, we have

4x = 68

Divide by 4

x = 17

Assume (2x+10)° and (2x - 10)° are complementary angles, we have

2x + 10 + 2x - 10 = 90

So, we have

4x = 90

Divide by 4

x = 22.5

Hence, the values of x are 17 and 22.5

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Customer: "Currently I am paying $60. 00 a month for my service. I would like to upgrade to the $80. 00 service package because my new employer offers a 20% discount with your company. What would be the cost difference compared to what I am paying now if I upgraded?" Employee: "With your discount you would only pay __________ a month more for the upgraded plan. "

Answers

"With your discount, you would only pay $4.00 a month more for the upgraded plan."

You are currently paying $60.00 a month for your service and you would like to upgrade to the $80.00 service package because your new employer offers a 20% discount with the company. Let's calculate the cost difference compared to what you are paying now if you upgraded.

Step 1: Calculate the discount on the $80.00 service package.
Your new employer offers a 20% discount, so to find the discount amount, multiply the original price by the discount percentage.
Discount = $80.00 * 20% = $80.00 * 0.20 = $16.00

Step 2: Subtract the discount from the original price to find the new monthly cost.
New price = Original price - Discount = $80.00 - $16.00 = $64.00

Step 3: Calculate the cost difference between your current plan and the upgraded plan.
Cost difference = New price - Current price = $64.00 - $60.00 = $4.00

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PLEASE HELPPPPPPPP
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The area under the curve at the given points is 3.758 sq.units.

What is the area under the curve?

The area under the curve at the given points is calculated as follows;

y = -3/x ; (-7, -2)

To find the area under the curve y = -3/x between x = -7 and x = -2, we need to integrate the function from x = -7 to x = -2.

∫[-7,-2] (-3/x) dx

= [-3 ln|x|]_(-7)^(-2)

= [-3 ln|-2| - (-3 ln|-7|)]

= [-3 ln(2) + 3 ln(7)]

= 3 ln(7/2)

= 3.758 sq.units

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Please help me now Asapppp

Answers

So the angles that must be right angles are KER and ERI.

What is angle?

An angle is a geometric figure formed by two rays that share a common endpoint, called the vertex of the angle. The rays are usually denoted by the letters A and B, and the vertex is denoted by the letter V. The angle is denoted by the symbol ∠, followed by the letters of the rays with the vertex in between, such as ∠AVB. The measure of an angle is the amount of rotation needed to move one ray to coincide with the other ray, and is usually given in degrees or radians. Angles are used in many areas of mathematics and science, such as trigonometry, geometry, physics, and engineering. They are also used in everyday life, such as in navigation, construction, and design.

Here,

Since RE and RI are secants of the circle, we can use the Intersecting Secants Theorem to find the relationships between the angles in the diagram.

Angle ERK is half of the intercepted arc EIK, so we have m∠ERK = 1/2m(arc EIK).

Similarly, angle KRI is half of the intercepted arc KE, so we have m∠KRI = 1/2m(arc KE).

Angle REI is an exterior angle of triangle KIR, so we have m∠REI = m∠ERK + m∠KRI.

To determine which angles must be right angles, we need to look for cases where the intercepted arcs are semicircles, which have a measure of 180 degrees.

If arc EIK is a semicircle, then m(arc EIK) = 180 and m∠ERK = 1/2(180) = 90. Therefore, angle ERK is a right angle.

If arc KE is a semicircle, then m(arc KE) = 180 and m∠KRI = 1/2(180) = 90. Therefore, angle KRI is a right angle.

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Whats 4x + 5 = 6 (x + 3) - 20 - 2x

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To solve this equation, we first simplify both sides of the equation by using the distributive property to expand the right-hand side:

4x + 5 = 6(x + 3) - 20 - 2x

4x + 5 = 6x + 18 - 20 - 2x

Next, we can combine like terms on the right-hand side:

4x + 5 = 4x - 2

Now, we can subtract 4x from both sides to isolate the variable on one side of the equation:

4x - 4x + 5 = 4x - 4x - 2

5 = -2

This is a contradiction since 5 cannot be equal to -2. Therefore, there is no solution to this equation.

In other words, the equation is inconsistent and there is no value of x that can make it true.

Find the surface area of the regular pyramid 6 cm 4cm help

Answers

The surface area of the given regular pyramid is 84 cm^2.

To find the surface area of a regular pyramid, we need to calculate the area of each face and add them together. A regular pyramid has a base that is a regular polygon, and its lateral faces are triangles that meet at a common vertex. We can use the Pythagorean theorem to find the slant height of the pyramid, which is the height of each lateral face.

Let's assume that the base of the regular pyramid is a square with side length 6 cm, and the slant height is 4 cm.

First, we need to find the area of the base of the pyramid:

Area of the base = (side length)^2

                = 6 cm x 6 cm

                = 36 cm^2

Next, we need to find the area of each triangular lateral face. Since the pyramid is a regular pyramid, all the triangular faces are congruent.

We can find the area of each triangular face using the formula:

Area of a triangle = (1/2) x base x height

The base of each triangular face is equal to the side length of the square base, which is 6 cm. The height of each triangular face is equal to the slant height, which is 4 cm.

Area of each triangular face = (1/2) x 6 cm x 4 cm

                            = 12 cm^2

Since the pyramid has 4 triangular faces, we need to multiply the area of one triangular face by 4 to get the total area of all the triangular faces:

Total area of the triangular faces = 4 x 12 cm^2

                                 = 48 cm^2

Finally, we can find the total surface area of the pyramid by adding the area of the base and the area of the triangular faces:

Total surface area = Area of the base + Total area of the triangular faces

                  = 36 cm^2 + 48 cm^2

                  = 84 cm^2

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Select the correct answer. The Richter scale measures the magnitude, M, of an earthquake as a function of its intensity, I, and the intensity of a reference earthquake, IO. M = log(I/log) Which equation calculates the magnitude of an earthquake with an intensity 10,000 times that of the reference earthquake? OA. M = log(10,000) OB. M = log(10,000/Io) OC. M = log(1/10,000) OD. M = log(I/10,000)

Answers

OD. M = log(I/10,000)

How can the magnitude of an earthquake be calculated when its intensity is 10,000 times that of the reference earthquake?

The correct equation that calculates the magnitude, M, of an earthquake with an intensity 10,000 times that of the reference earthquake is option B: M = log(10,000/Io).

In the given equation M = log(I/IO), I represents the intensity of the earthquake being measured, and IO represents the intensity of the reference earthquake. Since the intensity of the earthquake in question is 10,000 times that of the reference earthquake, we substitute I with 10,000 times IO.

Therefore, the equation becomes M = log(10,000/Io), which is option B. This equation allows us to calculate the magnitude of the earthquake based on the relative intensity compared to the reference earthquake.

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This equation shows how the cost of a plumber's visit is related to its duration in hours. C = 51d

The variable d represents the duration of the visit in hours, and the variable c represents the cost. If a plumber's visit lasted 1 hour, how much would it cost?

Answers

The cost of a plumber's one-hour visit is $51, determined by the linear equation C = 51d, where C is the cost and d is the duration of the visit in hours.

How is the cost of a plumber's visit determined by duration?

If a plumber's visit lasts for a certain duration, the cost can be determined using the equation

                           C = 51d

where C is the cost and d is the duration of the visit in hours.

In this case, the duration of the plumber's visit is given as 1 hour. Substituting d = 1 in the equation, we get

                             C = 51(1) = $51

as the cost of the plumber's visit.

Therefore, if the plumber's visit lasts for one hour, it would cost $51 according to the given equation.

This cost may vary if the duration of the visit changes, as it is directly proportional to the duration of the visit.

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Use the equations to find ∂z/∂x and ∂z/∂y. ez = 5xyz

Answers

The partial derivative of z with respect to x is 5xy + 5xz, and the partial derivative of z with respect to y is 5xz + 5yz.

To find the partial derivatives of z with respect to x and y, we use the chain rule. The chain rule allows us to find the rate of change of a function with respect to one of its independent variables while holding all other independent variables constant.

Using the chain rule, we can find the partial derivatives of z with respect to x and y as follows:

∂z/∂x = 5(yz) + 5x(1)(z)

∂z/∂x = 5xy + 5xz

∂z/∂y = 5(xz) + 5y(1)(z)

∂z/∂y = 5xz + 5yz

Therefore, the partial derivative of z with respect to x is 5xy + 5xz, and the partial derivative of z with respect to y is 5xz + 5yz.

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A student lifts a 12 n textbook 1. 5 and carries the book 5 m across the room in 7s

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The student does 18 J of work on the textbook. Their power output is 0.0228 W. Work is calculated by multiplying force and displacement, while power is the rate at which work is done and is calculated by dividing work by time.

To calculate the work done by the student on the textbook, we use the formula

work = force x distance x cos(theta)

where force is the weight of the textbook, distance is the height it is lifted, and theta is the angle between the force and distance vectors, which is 0 degrees since the force is acting vertically upward and the distance is upward as well. Thus, we have

work = 12 N x 1.5 m x cos(0) = 18 J

To calculate the power output of the student, we use the formula:

power = work / time

where work is the work done by the student on the textbook, and time is the total time it took to lift and carry the book. Thus, we have:

time = 1.5 s + 7 s = 8.5 s

power = 18 J / 8.5 s = 2.12 W

Therefore, the student did 18 J of work on the textbook, and had a power output of 2.12 W.

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--The given question is incomplete, the complete question is given

" a student lifts a 12 N textbook 1.5 m in 1.5 s and carries the books 5 m across the room in 7 s. how much work does the student do on the textbook? and what is the power output of the student.​"--

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