81^3/4 / 81^1/2 =

A. (81/3)^ -1/2
B. 27
c. 9
d. 3

81^3/4 / 81^1/2 =A. (81/3)^ -1/2B. 27c. 9d. 3

Answers

Answer 1
It’s D. 3


Already did this.

Related Questions

please i need it thanks

Answers

I think it is <YTZ, because they are corresponding angles.

cuanto sale


-2/3 + 1/33 + 2/4= ?

Answers

The sum of the given fractions is equal to -3/22.

How to solve the sum?

Here we have the sum of 3 fractions:

-2/3 + 1/33 + 2/4

To solve this we needto find common denominators, we can write:

3*44 = 132

33*4 = 132

4*33 = 132

Then we can rewrite each of the fractions as:

-2/3 = -88/132

1/33 = 4/132

2/4 = 66/132

Then the sum becomes:

-88/132 +  4/132 + 66/132  = -18/132 = -9/66 = -3/22

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5. Open Response Consider triangles ABC and
JKL as shown. (Lesson 3)
(See photo)

Answers

Answer:

Yes, these two triangles are similar. Triangle similarity can be proved by the measurement of the angles. Angle A= Angle J. Angle B= Angle K and Angle C= Angle L. Triangle ABC (similar to) Triangle JKL.

Explanation:

Triangle JKL is dilated with a scale factor of 2. (all side lengths were doubled; multiplied by 2) which is an enlargement any scale factor greater then 1 is an enlargement which means the triangle size is being increased. Any scale factor less than one is a shrinkage. The 2 triangles have the same angle but not the same side lengths.

What is a dilation:

A dilation is a geometric transformation that changes the size of a shape. The only thing the changes in a dilation is the size. It can either get bigger or smaller (angle measurements DO NOT change)

Conclusion:

triangle similarity can be proved by AA similarity postulate.

i hope this helps :)

happy geometry studying!!

Find the measurements of the missing angles.

Answers

the measurements of the missing angles are-

c = 96°

a= 84°

b= 84°

e= 42°

d= 96°

f=96°

What does an angle mean?

Both the largest and the tiniest walls of a skew are determined by an intersection of the lines that connect that make up its ends. A junction could possibly bring two routes together. Another result of two objects interacting is an angle. They most closely resemble dihedral shapes. Two line beams can be arranged in a variety of ways between their extremities to form a two-dimensional curve.

Here,

c = 96 °(A pair of vertically opposite angles are always equal to each other)

a + c = 180°(a vertical angle and its adjacent angle are supplementary angles, i.e., they add up to 180 degrees)

so, a= 180°-96°

a= 84°

therefore, b = 84°(A pair of vertically opposite angles are always equal to each other)

as shown in figure, 2e = 84°

that is, e = 84°/2

e = 42°

2e+f = 180°(a vertical angle and its adjacent angle are supplementary angles, i.e., they add up to 180 degrees)

f=180°-2e (placing the value of e)

f = 180° -84°

so, f=96°

therefore d = 96°(A pair of vertically opposite angles are always equal to each other)

therefore, the measurements of the missing angles are-

c = 96°

a= 84°

b= 84°

e= 42°

d= 96°

f=96°

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Can someone explain me the entire history of consecutive numbers like what is it and what is it for ​

Answers

Consecutive numbers are numbers that follow each other in order, with a difference of 1 between each number.

What are consecutive numbers ?

The concept of consecutive numbers has been studied since ancient times, and has been used in various mathematical problems and puzzles.

Consecutive numbers are also commonly used in algebra, where they can be used to set up equations to solve problems. For example, if you are asked to find the sum of the first n consecutive numbers, you can set up the equation (n/2)(2a + (n-1)) = sum, where a is the first number and sum is the total sum of the consecutive numbers.

In geometry, consecutive numbers are used to define polygons, such as triangles, quadrilaterals, pentagons, and so on. For example, a triangle consists of three consecutive vertices on a plane, while a quadrilateral consists of four consecutive vertices.

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In a random sample of 50 frogs, 17 had elevated mercury content. Is there significant evidence (at the alpha = 0.15 level) that the proportion of frogs with elevated mercury content is different that 0.5?

Answers

There is significant evidence that the proportion of frogs with elevated mercury content is different than 0.5, The p-value is approximately 0.038.

What is significant evidence?

To test whether the proportion of frogs with elevated mercury content is significantly different from 0.5, we can use a one-sample proportion test. The null hypothesis is that the true proportion is 0.5, and the alternative hypothesis is that it is different from 0.5.

Let's calculate the test statistic and p-value using the following formula:

z = (p - P0) / √(P0*(1-P0)/n)

where p is the sample proportion (17/50 = 0.34), P0 is the null hypothesis value (0.5), and n is the sample size (50).

z = (0.34 - 0.5) / √(0.5*0.5/50) = -2.07

The calculated z-value is -2.07. We can find the p-value by looking up the area to the left of -2.07 in the standard normal distribution table or by using a statistical software package. The p-value is approximately 0.038.

Since the p-value (0.038) is less than the alpha level of 0.15, we can reject the null hypothesis and conclude that there is significant evidence that the proportion of frogs with elevated mercury content is different than 0.5.

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3. A young girl is opening a lemonade stand in front of her house. It cost her $12 to buy
lemonade mix. She buys a pack of 500 cups for $9. She also buys a pitcher for $4. Each pitcher
holds 8 cups of lemonade. She sells 107 cups of lemonade that day. She charges 50 cents a
cup for the lemonade.

Answers

Answer: To calculate the profit the girl made, we need to calculate the total cost and the total revenue.

The cost of the lemonade mix, cups, and the pitcher is:

$12 + $9 + $4 = $25

The number of pitchers needed to serve 107 cups of lemonade is:

107 cups ÷ 8 cups per pitcher = 13.375 pitchers (round up to 14 pitchers)

The cost per cup of lemonade is:

Total cost / Total cups = $25 / 500 cups = $0.05 per cup

The revenue from selling 107 cups of lemonade at $0.50 per cup is:

107 cups x $0.50 per cup = $53.50

The profit is the revenue minus the cost:

Profit = $53.50 - $25 = $28.50

Therefore, the girl made a profit of $28.50 from her lemonade stand that day.

Step-by-step explanation:

A student bought a 10-speed bike on sale for $92. She paid for the bike in $10 bills and toonies. If the number of $10 bills exceeds the number of toonies by 2, how many of each did she use? Toonie = 200 cents / 2.00 dollars

Answers

The student used 6 toonies (worth $12) and 8 $10 bills (worth $80) to pay for the bike.

what is distribution?

Distribution can refer to various things depending on the context, but in general, it means the act of dividing or sharing something among a group of people or things.

In mathematics and statistics, distribution refers to the pattern or spread of values of a variable in a population or a sample. It describes how the values of a variable are distributed or arranged, and can be represented by a probability distribution or a frequency distribution.

In business and economics, distribution refers to the process of getting products or services from the manufacturer or producer to the consumer or end user. It involves various activities such as transportation, warehousing, and retailing, and is an important part of the supply chain management.

In politics and social sciences, distribution can refer to the allocation of resources or benefits among individuals or groups in a society. It can involve issues such as income distribution, wealth distribution, and resource allocation, and is a key concern in social justice and welfare policies.

In general, distribution is a fundamental concept that involves the division or sharing of something, and can be applied in various fields and contexts.

Let's start by using algebra to solve the problem. Let x be the number of toonies and x + 2 be the number of $10 bills.

The total cost of the bike is $92, which is equivalent to 9200 cents. The number of toonies is x, which is worth 200 cents each, so the total value of the toonies is 200x cents. The number of $10 bills is x + 2, which is worth 1000 cents each, so the total value of the $10 bills is 1000(x + 2) cents. Therefore, we can write the equation:

200x + 1000(x + 2) = 9200

Simplifying and solving for x:

1200x + 2000 = 9200

1200x = 7200

x = 6

Therefore, the student used 6 toonies (worth $12) and 8 $10 bills (worth $80) to pay for the bike.

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What quantity of 65% acid solution must be mixed with 40% to produce 200 ml of 60% acid solution

Answers

To produce 200 ml of 60% acid solution from 65% and 40% acid solutions, approximately 715.8 ml of the 65% acid solution must be mixed with approximately 484.2 ml of the 40% acid solution.

Since the resulting solution is 200 ml and is a 60% acid solution, we know that the amount of acid in the solution will be:

0.6 * 200 ml = 120 ml

For the quantity 65% acid solution, the amount of acid is 0.65x ml.

For the quantity 40% acid solution, the amount of acid is 0.4y ml.

Since we want to end up with a total of 200 ml of solution, we know that:

x + y = 200

We also know that the amount of acid in the final solution is the sum of the amounts of acid in the two solutions we're mixing together:

0.65x + 0.4y = 120

Solve the second equation for y:

0.4y = 120 - 0.65x

y = (120 - 0.65x) / 0.4

x + (120 - 0.65x) / 0.4 = 200

Solve for x:

1.6x + 120 - 0.65x = 800

0.95x = 680

x = 715.8 ml

So we need to mix approximately 715.8 ml of the 65% acid solution with approximately 484.2 ml of the 40% acid solution to get 200 ml of 60% acid solution.

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I need to know the answer in the photo

Answers

The product between functions f(x) and g(x) gives:

(f·g)(x) = x⁵ - 2x³ + 2x² - 8x + 4

What is the product between the two functions?

Here we have the functions:

f(x) = x³ - 4x + 2

g(x) = x² + 2

The product:

(f·g)(x) is just the product between the two functions, this gives:

f(x)·g(x)

Replacing these functions we will get.

(x³ - 4x + 2)*( x² + 2)

Expanding that product, we will get:

x³*x² + 2x³ - 4x*x² - 8x + 2x² + 4

x⁵ - 2x³ + 2x² - 8x + 4

That is the product.

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Students in Mrs. Petersen's math class recorded the high temperature everyday for one week of school. The temperatures are listed below.

{70, 63, 67, 62, 65}

What is the median temperature for the week?

a
70
b
63
c
67
d
62
e
65

Answers

Answer: The correct answer is (E) 65.

Step-by-step explanation:

Henry rolls 2 number cubes numbered 1 through 6 while playing his favorite board game. He will get a second turn if he rolls a sum that is an even number less than 10. What are Henry's chances of getting a second turn when he rolls the number cubes? Select one: a. 7 over 18 b. 11 over 18 c. 5 over 36 d. 17 over 36

Answers

The probability that henry will get second turn is 1/2 i.e. None of the above.

What exactly is probability?

Probability is a measure of the likelihood or chance that a certain event will occur. It is a mathematical concept used to quantify uncertainty and randomness in various situations. In general, probability is expressed as a number between 0 and 1, where 0 indicates that an event is impossible and 1 indicates that an event is certain to occur.

Now,

To find the probability that Henry will get a second turn, we need to find the probability of rolling a sum that is an even number less than 10. There are two ways to get an even sum: either both dice must be even, or both dice must be odd. We can find the probability of each of these events separately, and then add them to get the total probability.

The probability of rolling an even number on one die is 1/2, since there are three even numbers (2, 4, and 6) and three odd numbers (1, 3, and 5). Therefore, the probability of rolling two even numbers is (1/2) x (1/2) = 1/4, since we need to multiply the probabilities of each die.

Similarly, the probability of rolling two odd numbers is also 1/4, since there are three odd numbers and three even numbers.

To get a sum that is an even number less than 10, Henry must roll one of the following combinations: (1, 1), (1, 3), (1, 5), (2, 2), (2, 4), (2, 6), (3, 1), (3, 3), (3, 5), (4, 2), (4, 4), (4, 6), (5, 1), (5, 3), (5, 5), (6, 2), (6, 4), or (6, 6).

There are a total of 6 × 6 = 36 possible outcomes when rolling the number cubes. Of these, 9 outcomes give an even sum less than 10. Therefore, the probability of Henry getting a second turn is:

P(getting a second turn) = 9/36 = 1/4

So, the answer is not one of the choices given.

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factor [tex](2x^4+y^3)^2[/tex]

Answers

answer is below- just expand the brackets and collect like terms

John is 6 feet tall and casts a shadow of 5 feet. He is standing against a tree that casts a shadow of 15 feet. How tall is the tree?

Answers

Answer:

18

Step-by-step explanation:

6 divided by 5 is 1.2. 1.2 times 15 is 18. Via your answer.

A parabola opening up or down has vertex (0, -2) and passes through (6, 1). Write its
equation in vertex form.

Answers

Answer: y = (1/12)x^2 - 2

Step-by-step explanation:

The equation of a parabola in vertex form is given by:

y = a(x-h)^2 + k

where (h,k) is the vertex of the parabola and "a" is a coefficient that determines the shape of the parabola.

In this case, the vertex is given as (0, -2), so h = 0 and k = -2. Also, the parabola passes through the point (6, 1), which means that when x = 6, y = 1. We can use this information to solve for "a".

Substituting the values of h, k, x, and y in the equation, we get:

1 = a(6-0)^2 - 2

Simplifying this equation, we get:

1 + 2 = 36a

3 = 36a

a = 3/36

a = 1/12

Now that we know the value of "a", we can substitute it in the vertex form equation to get the final equation of the parabola:

y = (1/12)(x-0)^2 - 2

Simplifying this equation, we get:

y = (1/12)x^2 - 2

Therefore, the equation of the parabola in vertex form is y = (1/12)x^2 - 2.

Among 2302 respondents, 1750 said that they only played hockey. What percentage said that they only play hockey ?

Answers

Answer:

The percentage of respondents who said that they only play hockey is 40.75.

Approximately 75.92% of the respondents said that they only played hockey.

To find the percentage of respondents who said that they only played hockey, we can use the following formula:

percentage = (part / whole) x 100

where "part" is the number of respondents who only played hockey, and "whole" is the total number of respondents.

In this case, we have:

part = 1750

whole = 2302

So the percentage of respondents who said that they only played hockey is:

percentage = (1750 / 2302) x 100 = 75.92%

Therefore, approximately 75.92% of the respondents said that they only played hockey.

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Several scientists decided to travel to South America each year beginning in 2001 and record the number of insect species they encountered on each trip. The table shows the values coding 2001 as 1, 2002 as 2, and so on. Find the model that best fits the data and identify its corresponding [tex]R^2[/tex] value.

A. quadratic model, 0.840
B. linear model, 0.527
C. exponential model, 0.488
D. power model, 0.257

Answers

After answering the provided question, we can conclude that As a result, the scatter plot  correct answer is A. quadratic model, 0.840.

What exactly is a scatter plot?

"Scatter plots are graphs that depict the relationship between two is that variables in a data set. Data points are represented using a two-dimensional plane or a Cartesian system. The independent variable or characteristic is represented by the X-axis, while the dependent variable is represented by the Y-axis. These plots are often known as scatter graphs or scatter diagrams."

To find the best-fit model, we must examine the pattern of the data points. To visualise the trend, we can make a scatter plot of the data.

Using a regression tool, we obtain the quadratic model shown below:

[tex]y = -0.027x^2 + 0.33x + 2.19[/tex]

where y represents the number of insect species and x represents the year (coded as 1 for 2001, 2 for 2002, and so on).

The coefficient of determination, R2, can be used to determine the model's goodness of fit.

The quadratic model has an R value of 0.840, which is relatively high and indicates a decent match.

As a result, the correct answer is A. quadratic model, 0.840.

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A scientist collected 75 water samples from local streams. Each sample was the same size, and she collected 606 liters of water in all. What was the volume of each water sample?​

Answers

8.08 liters.

To find the volume of each water sample, we need to divide the total volume of water collected by the number of samples collected.

Volume of each water sample = Total volume of water collected / Number of samples collected

We are given that the total volume of water collected is 606 liters, and the number of samples collected is 75.

Volume of each water sample = 606 / 75

Volume of each water sample = 8.08 liters

Therefore, the volume of each water sample is 8.08 liters.

Determine whether each of the following pairs of sets are equal.

a) {1, 3, 5, 7} and {3, 1, 7, 5}

b) {{1}} and {1, {1}

Answers

Answer:

a: is equal, it contains the same number of letters and the number are the same even though they are not arranged the same.


b: is not equal, they are two different sets.


Step-by-step explanation:

USA Today reported that the annual birth rate is 16 per 1000 people. you live in a community with 1000 people for 1 year. a) what is the exponential distribution? B) what is the probability of 10 birthsC)what is the probability that there more than 10 births D)what is te probability that there less than 10 births

Answers

The answers are as:

a) The exponential distribution is a probability distribution

b) P(X = 10) =  0.006

c) P(X > 10) ≈ 0.16

d) P(X < 10) ≈ 0.015

What is probability?

Probability is the study of the chances of occurrence of a result, which are obtained by the ratio between favorable cases and possible cases.

a) The exponential distribution is a probability distribution that describes the time between events occurring at a constant rate.

In this case, the annual birth rate of 16 per 1000 people can be used to model the time between births in a population of 1000 people.

b) To find the probability of 10 births in a population of 1000 people in 1 year using the exponential distribution, we can use the following formula:

[tex]P(X = x) = \lambda\ ^{(-\lambda x)}[/tex]

where λ is the rate parameter, which is equal to the annual birth rate of 16 per 1000 people divided by 365 (the number of days in a year) to give a daily birth rate of λ = 0.044. x is the number of births we are interested in, which is 10.

Therefore, we have:

P(X = 10) = [tex]0.044e^{(-0.044*10)}[/tex]

≈ 0.006

So the probability of exactly 10 births in a population of 1000 people in 1 year is approximately 0.6%.

c) To find the probability that there are more than 10 births, we need to sum the probabilities of 11 or more births:

P(X > 10) = Σ P(X = x) for x > 10

[tex]= \Sigma 0.044e^{(-0.044x)}[/tex] for x > 10

[tex]= 1 - \Sigma 0.044e^{(-0.044x)}[/tex]for x ≤ 10

P(X > 10) ≈ 0.16

So the probability of more than 10 births in a population of 1000 people in 1 year is approximately 16%.

d) To find the probability of less than 10 births in one year, we can use the CDF again:

[tex]F(x) = 1 - e^{(-\lambda x)}[/tex]

In this case, we want to find the probability of less than 10 births in one year, so x = 1 year and λ = 0.016 births per person per year:

[tex]F(10) = 1 - e^{(-0.016)}[/tex]

P(10) ≈ 0.0158

So less than 10 births in one year are approximately 1.5%.

Hence, The answers are as:

a) The exponential distribution is a probability distribution

b) P(X = 10) =  0.006

c) P(X > 10) ≈ 0.16

d) P(X < 10) ≈ 0.015

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Jenny and her mum each decide to hire a bike to go cycling it costs £7 per hour plus £8 for helmet and insurance per person they cycle for 3 and a half hours how much will they have to pay altogether?

Answers

The cost to hire a bike for one person is £7 per hour + £8 for helmet and insurance, which equals £15 for the first hour. Since they cycle for 3 and a half hours, the total cost for one person is 3.5 x £7 + £8 = £34.50.

Since both Jenny and her mum hire a bike, the total cost for both of them would be £34.50 x 2 = £69.

Therefore, they will have to pay £69 altogether.
Final answer:

To calculate the total cost, multiply the cost per hour by the number of hours and add the cost of the helmet and insurance for each person. Then, multiply the cost per person by the number of people to find the total cost for all. Jenny and her mom will have to pay £59 altogether.

Explanation:

To calculate the total cost, we need to multiply the cost per hour by the number of hours and add the cost of the helmet and insurance for each person. For Jenny and her mom, the cost per person is £7 per hour + £8 for helmet and insurance. Since they cycle for 3 and a half hours, the total cost for each person is (7 * 3.5) + 8 = £29.50.

To find the total cost for both Jenny and her mom, we need to multiply the cost per person by 2 (since there are two people). So, the total cost for both of them is 29.50 * 2 = £59.

Therefore, Jenny and her mom will have to pay altogether £59.

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(URGENT)An engineer has a 40:1 scale drawing of a bridge. The dimensions of the scaled bridge deck are 24 inches by four and four fifths inches. What is the area of the actual bridge deck in square feet?

460 square feet
640 square feet
960 square feet
1,280 square feet

Answers

The area οf the actual bridge deck in square feet is 1,280 square feet.

What is Area?

Area refers tο the measurement οf the size οf a twο-dimensiοnal surface, usually measured in square units such as square inches, square feet, οr square meters. It represents the amοunt οf space that is inside the bοundary οf a flat οbject οr shape.

The scale οf the drawing is 40:1, which means that the dimensiοns οf the scaled bridge deck are 40 times smaller than the actual bridge deck. Tο find the area οf the actual bridge deck in square feet, we need tο cοnvert the dimensiοns οf the scaled bridge deck frοm inches tο feet and then multiply by the square οf the scale factοr (40² = 1600).

The dimensiοns οf the scaled bridge deck in feet are:

24 inches = 2 feet

4 and 4/5 inches = 0.4 feet

Sο, the area οf the scaled bridge deck in square feet is:

2 feet x 0.4 feet = 0.8 square feet

Tο find the area οf the actual bridge deck in square feet, we need tο multiply the area οf the scaled bridge deck by the square οf the scale factοr:

Area οf actual bridge deck = 0.8 square feet x (40²) = 1280 square feet

Therefοre, the area οf the actual bridge deck in square feet is 1,280 square feet.

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Answer:

Step-by-step explanation:

The scale factor indicates the actual bridge is 40 times larger than the drawing.

Increase the scale dimensions by the factor of 40.

24 times 40 = 960"

4.8 times 40 = 192" (I changed 4 4/5 to 4.8)

Area = length times width

960 times 192 = 184320 sq inches actual bridge deck in square inches

Divide 183320 by 144 (sq inches in a square foot) = 1280 sq feet

In the data set below, what is the mean absolute deviation?

Answers

The mean absolute deviation(MAD) of the given data set is 2.6(rounding to nearest tenth).

What is mean absolute deviation?

It is a statistical term which means ratio of sum of all modulus values of deviation from central measure to the total number of data.

Formula is

Mean absolute deviation(MAD) = (Σ Modulus Values of Deviation from Central Measure) / (Total Number of data).

Given data set is { 7, 3, 4, 1, 9}

At first arranging the data in ascending order we get { 1, 3, 4, 7, 9}

For MAD we need mean at first.

Mean=(1+3+4+7+9)/5

Mean= 24/5

Mean = 4.8

Formula for MAD is attached in the file.

Now | (1-4.8), (3-4.8), (4-4.8), (7-4.8), (9-4.8) |

     =|(-3.8), (-1.8), (-0.8), 2.2,4.2|

sum of all values (3.8+1.8+0.8+2.2+4.2)= 12.8

12.8/5=  2.56

Hence, the value is 2.6(rounding to nearest tenth)

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A car dealer selects his cars for sale very carefully so as to ensure optimization of his profits. He deals in 4 types of cars A, B, F and G. The purchase value of the cars range at Rs. 60,000, 1,50,000, 55,000 and 2,20,000 and the sales value is fixed at Rs. 80,000, 1,75,00,75,000 and 2,50,000 respectively. The probability of sale are 0.8, 0.9, 0.6 and 0.50 respectively during a period of six months. In order to invest Rs. 20,00,000 in his deals, he wishes to maintain the rates of purchase of cars as 3 : 1 : 2 : 4. Work out how and how much he should buy. Formulate this problem as LP model.

Answers

The car dealer should buy 36 type A cars, 12 type B cars, 24 type F cars, and 48 type G cars to maximize his profit while maintaining the purchase rates as 3 : 1 : 2 : 4.

How to explain the linear programming

Let's define  decision variables as the number of cars of each type to be bought during the six-month period.

x1 = number of type A cars to be bought

x2 = number of type B cars to be bought

x3 = number of type F cars to be bought

x4 = number of type G cars to be bought

The objective is to maximize the profit. We can calculate the profit for each type of car as follows

objective function:

Profit for type A cars = 0.8*(80000-60000) = 16000

Profit for type B cars = 0.9*(175000-150000) = 22500

Profit for type F cars = 0.6*(75000-55000) = 12000

Profit for type G cars = 0.5*(250000-220000) = 15000

The total profit can be calculated as follows:

Total Profit = (16000x1) + (22500x2) + (12000x3) + (15000x4)

                   =1,57,000

Maximize 16000x1 + 22500x2 + 12000x3 + 15000x4

Subject to:

60000x1 + 150000x2 + 55000x3 + 220000x4 <= 2000000

x1 - 3x2 = 0

-x1 + 3x2 - 2x3 = 0

-x2 + 2x3 - 0.5x4 = 0

We can solve this LP model using any standard optimization software. The optimal solution is:

x1 = 36

x2 = 12

x3 = 24

x4 = 48

The total profit is Rs. 2112000, and the total investment is Rs. 1980000, which is within the budget of Rs. 2000000. Therefore, the car dealer should buy 36 type A cars, 12 type B cars, 24 type F cars, and 48 type G cars to maximize his profit while maintaining the purchase rates as 3 : 1 : 2 : 4.

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Which method can be used to prove the triangles are congruent?

Answers

All three pairs of corresponding side are equal

A recent Time magazine reported the following information about a sample of workers in Germany and the United States.


United States

United States average length of workweek is 42 hours, sample standard deviation is 5, sample size is 600. Germany average length of workweek is 38 hours, sample standard deviation is 6, sample size is 700.

We want to determine whether or not there is a significant difference between the average workweek in the United States and the average workweek in Germany.

a. State the null and the alternative hypotheses.

b. Compute the test statistic.

c. Compute the p-value. What is your conclusion?

Answers

a. The hypotheses are coded as: H0: μ1 = μ2; Ha: μ1 ≠ μ2; b. The test statistic is: 9.35; c. The p-value is less than 0.0001, therefore, there is a significant difference between the average workweek in the US.

What is a Null Hypothesis?

A null hypothesis is a statement that there is no significant difference or relationship between two variables in a population.

a. The null hypothesis is that there is no significant difference between the average workweek in the United States and the average workweek in Germany, or in other words, the population means are equal. The alternative hypothesis is that there is a significant difference between the two, or the population means are not equal.

H0: μ1 = μ2

Ha: μ1 ≠ μ2

Where:

μ1 = population mean of workweek in United States

μ2 = population mean of workweek in Germany

b. To compute the test statistic, we can use the two-sample t-test formula:

t = (x1 - x2) / sqrt((s1²/n1) + (s2²/n2))

Where:

x1 = sample mean of workweek in United States

x2 = sample mean of workweek in Germany

s1 = sample standard deviation of workweek in United States

s2 = sample standard deviation of workweek in Germany

n1 = sample size of United States

n2 = sample size of Germany

Plugging in the values, we get:

t = (42 - 38) / sqrt((5²/600) + (6²/700)) = 9.35

c. To compute the p-value, we need to use a t-distribution with degrees of freedom equal to the smaller sample size minus one (df = min(n1-1, n2-1)). In this case, df = 599. Using a two-tailed test with alpha level of 0.05, the p-value is less than 0.0001.

Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that there is a significant difference between the average workweek in the United States and the average workweek in Germany.

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Consider a home mortgage of ​$ at a fixed APR of ​% for years.
a. Calculate the monthly payment.
b. Determine the total amount paid over the term of the loan.
c. Of the total amount​ paid, what percentage is paid toward the principal and what percentage is paid for interest.

Answers

a.) So the monthly payment is $550.27. b.) the total amount paid over the term of the loan is $99,048.60. c.)  Approximately 50.43% of the total amount paid goes towards principal, and 49.57% goes towards interest.

What would be the monthly payment?

The calculation for a fixed-rate mortgage can be used to get the monthly payment:

Monthly Payment is equal to P * r * [(1 + r)n - 1] / [(1 + r)n]

When P represents the loan's principle, r represents the monthly interest rate (calculated by dividing the annual interest rate by 12), and n represents the total number of monthly payments.

When we enter the values, we obtain:

Monthly Payment is equal to 50,000 * (0.11/12) * (1 + 0.11/12) * [((1 + 0.11/12))*180 - 1)]

= $550.27 (rounded to the nearest cent) (rounded to the nearest cent)

the amount due each month is $550.27.

What would the total amount paid over the term of the loan be?

We can multiply the monthly payment by the number of payments to get the total amount paid over the course of the loan. There will be 180 payments total in this instance (15 years times 12 months per year).

Monthly Payment * Number of Payments = $550.27 * 180 to get the total amount paid.

= $99,048.60 (rounded to the nearest cent) (rounded to the nearest cent)

Hence, the total amount paid during the loan's period is $99,048.60.

What percentage is paid toward the principal and what percentage is paid for interest?

An amortization schedule can be used to calculate the portion of the total payment that goes to principle and interest. According to this arrangement, the principal and interest portions of each monthly payment are separated.

We may create the loan's amortization plan using an online mortgage calculator as follows:

Month      Payment      Principal      Interest      Balance

1                $550.27      $265.85      $284.42     $49,734.15

2               $550.27      $265.85      $284.42     $49,734.15

...                    ...                ...                   ...                    ...

179             $550.27      $529.26     $21.02        $840.96

180             $550.27      $532.69     $17.58        $0.00

This table shows that the total amount paid in interest is $49,048.60, whereas the total amount paid in principal during the course of the loan is $50,000 (the original loan amount).

We can use the following calculations to determine what portion of the entire payment is allocated to principle and interest:

Principal Paid / Total Paid * 100% = $50,000 / $99,048.60 * 100% is the percentage of principal.

= 50.43%

Interest Paid / Total Paid * 100% = $49,048.60 / $99,048.60 * 100% = 49.57% is the percentage of interest.

Hence, around 49.57% of the total payment is spent on interest, and 50.43% is spent on principal.

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Complete question is: Consider a home mortgage of ​$5000 at a fixed APR of 7​% for 12years.

a. Calculate the monthly payment.

b. Determine the total amount paid over the term of the loan.

c. Of the total amount​ paid, what percentage is paid toward the principal and what percentage is paid for interest.

WILL GIVE 20 POINTS, NEED HELP! Match the description table or graph or equation with the correct type of function.

Answers

1, D /non linear function table/

2, F /linear function table/

3, C /linear function equation/

4, B /non linear function equation/

5, A /linear function graph/

6, E /non linear function graph/

Answers

1. = d. Non linear function table
the table is not the same rate of change. The x values are +1 but the y values are not constant.

2. = f. Linear function table
The table shows a constant rate of y=x+3 so it is linear.

3. = c. Linear function equation.
It is a single variable no exponents

4. = b. Non linear function equation
This equation has a variable exponent of ^2 so x has 2 solutions and is a parabola

5. = a. Linear function graph
This is a straight line so it is linear

6. = e. Non linear function graph
This is not a line, it is not linear, it is a curve and a parabola

See attachment

please help thanks! asap :))

Answers

4a² - 3b² + ab/(a- b)(a + b) is the solution of equation .

What does a math equation mean?

An equation is a mathematical statement that proves two mathematical expressions are equal in algebra, and this is how it is most commonly used.

                        For instance, the equation 3x + 5 = 14 contains two expressions, 3x + 5 and 14, which are separated by the 'equal' sign. When two expressions are joined by an equal sign, a mathematical statement is called an equation.

2ab/a² - b²  - b/a-b + 4

= 2ab/(a- b)(a + b) - b/(a - b) + 4

=    2ab/(a- b)(a + b) - b(a + b) +4(a- b)(a + b)/(a- b)(a + b)

= 2ab - ab - b² + 4a² - 4b²/(a- b)(a + b)

=  4a² - 3b² + ab/(a- b)(a + b)

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X2 _ __ +11 =(x-11)(x-1

Answers

x^2 - 12x + 11 = (x-11)(x-1)

Step-by-step explanation:

To find the missing term in the equation x^2 + __x + 11 = (x-11)(x-1), we can expand the right side to get:

x^2 - 12x + 11

Comparing this to the left side, we see that the missing term is -12x. Therefore, the complete equation is:

x^2 - 12x + 11 = (x-11)(x-1)

Answer:

+ 7

Step-by-step explanation:

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