Help me I don’t under stand this!

The rate of change of with respect to for this function is 1.75.

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

P = (-2, -7.5)

Q = (4, 3)

Using the two given points, we can find the slope of the line passing through them using the slope formula:

slope = (y2 - y1) / (x2 - x1)

where (x1, y1) = (-2, -7.5) and (x2, y2) = (4, 3)

slope = (3 - (-7.5)) / (4 - (-2))

= 10.5 / 6

= 1.75

Hence, the rate of change (i.e., the slope) of the line passing through points P and Q is 1.75.

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The only value of y that is a solution to the equation 40=5-7y is y=-5.

To identify solutions to a linear equation in one variable, we can plug in the given values of y and see if the equation is true.

For the first value of y, let's plug in y=1:
40=5-7(1)
40=5-7
40=-2

This equation is not true, so y=1 is not a solution to the equation.

Now let's try y=2:
40=5-7(2)
40=5-14
40=-9

This equation is also not true, so y=2 is not a solution to the equation.

Finally, let's try y=-5:
40=5-7(-5)
40=5+35
40=40

This equation is true, so y=-5 is a solution to the equation.

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It's important to evaluate the fit of the equation to the data before making any predictions or decisions based on it.

To determine the linear equation that best represents the trend line for a given scatter plot, we need to find the line of best fit. The line of best fit is a straight line that represents the general trend of the data and can be used to make predictions or estimates based on the data.

One way to find the line of best fit is by using the method of least squares. This involves finding the line that minimizes the sum of the squared differences between each data point and the line itself.

Once we have the line of best fit, we can express it as a linear equation of the form y = mx + b, where m is the slope of the line and b is the y-intercept.

To determine the linear equation that best represents the trend line for a given scatter plot, we would need to perform the following steps:

Plot the scatter plot of the given data points.

Visually inspect the scatter plot to see if there appears to be a linear relationship between the variables.

Calculate the line of best fit using the method of least squares.

Express the line of best fit as a linear equation of the form y = mx + b.

Use the equation to make predictions or estimates based on the data.

It's important to note that the linear equation that best represents the trend line for a scatter plot may not always be a good predictor of the data, especially if the data is not linear or if there are outliers present.

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Answer:

-17p+100

______

4

Step-by-step explanation: combine multiplied terms into a single fraction. distribute. combine multiplied terms into a single fraction. find a common denominator. combine fractions with a common denominator. multiply the numbers.Rearrange terms.Combine multiplied terms into a single fraction.Cancel terms that are in both the numerator and denominator.Find common denominator.Combine fractions with common denominator.Distribute.Add the numbers.Combine like terms

The correct classification for 11+8i is a complex number.√−81 can be expressed as the complex number 9i.

The number 11+8i is a complex number. This is because it has both a real part (11) and an imaginary part (8i). A complex number is any number that can be expressed in the form a+bi, where a and b are real numbers and i is the imaginary unit. Therefore, the correct classification for 11+8i is a complex number.

To express √−81 as a complex number, we can use the fact that √−1 = i. So, √−81 = √(81)*√(−1) = 9*i = 9i. Therefore, √−81 can be expressed as the complex number 9i.

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The answer is x(2-5x).

In factorization, you just need to identify the common factors and accordingly solve as per your requirement!

To factor the expression 2x-5x^(2) completely, we need to find the greatest common factor (GCF) of the two terms and factor it out. The GCF of 2x and 5x^(2) is x. So we can factor it out of the expression:

2x-5x^(2) = x(2-5x)

Now, the expression is factored in completely. The final answer is:

x(2-5x)

Therefore, factoring the expression 2x-5x^(2) gives the answer x(2-5x).

I hope this helps! Let me know if you have any further questions.

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An investment of $1,000 at an annual interest rate of 7.5%, compounded annually, will be worth $1,232.28 after 3 years.

Value is a term used to describe the worth of something, either in terms of money, or in terms of importance or usefulness. Value can be determined in terms of the amount of money something is worth, or the level of importance or usefulness it has to someone. When something has a high value, it means that it is worth a lot of money or has a high level of importance or usefulness.

The value of an investment of $1,000 after 3 years at an annual interest rate of 7.5%, compounded annually, can be calculated using the following formula:

Future Value (FV) = Present Value (PV) × (1 + r)ⁿ

Where PV is the present value of the investment ($1,000 in this case), r is the annual interest rate (7.5%) and n is the number of years (3).

Using this formula, we can calculate the future value of the investment after 3 years as follows:

FV = $1,000 × (1 + 0.075)³

FV = $1,000 × 1.23228

FV = $1,232.28

Therefore, an investment of $1,000 at an annual interest rate of 7.5%, compounded annually, will be worth $1,232.28 after 3 years.

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The predicted value of the car in the year 2009 is $6,232.

First we need to use the formula for exponential decay:

V(t) = V0 × e^(-rt)

Where

We know that the car was purchased in 2000 for $27,600, and that its value in 2004 was $8,300. Therefore, we can use these values to solve for the rate of decay:

$8,300 = $27,600 × e^(-r x 4)

e^(-4r) = 0.3

Taking the natural logarithm of both sides:

-4r = ln(0.3)

r = -0.3567

Now that we have the rate of decay, we can use the same formula to predict the value of the car in 2009, which is 9 years after the initial purchase:

V(9) = $27,600 × e^(-0.3567 x 9) = $6,232

Therefore, the predicted value of the car in the year 2009 is $6,232.

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The equation that models the objective function for the cost,  C=1x+.80y. (A)

This equation is the correct model because it represents the cost, C, as a function of the number of x and y items. The cost of each x item is $1, and the cost of each y item is $0.80.

Therefore, the total cost will be the sum of the cost of x items and the cost of y items, which is represented by the equation C=1x+.80y.

In contrast, options B, C, and D do not accurately represent the cost as a function of the number of x and y items. Option B includes a subtraction of the cost of y items, which would not accurately represent the total cost.

Options C and D include incorrect coefficients for the cost of x and y items, which would also not accurately represent the total cost.

Therefore, the correct equation to model the objective function for the cost, C, is option A. C=1x+.80y.

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Answer:

6

Step-by-step explanation:

[tex]1\frac{1}{2}[/tex] ÷ [tex]\frac{1}{4}[/tex] = [tex]\frac{3}{2}[/tex] ÷ [tex]\frac{1}{4}[/tex] = [tex]\frac{3}{2}[/tex] × [tex]\frac{4}{1}[/tex] = [tex]\frac{12}{2}[/tex] = 6  

An engineer is hired to design a bridge to carry traffic across the river.  The length of the bridge is 324.35 meters.

To find the distance from point A to point B, we can use the Law of Sines. This states that the ratio of the length of a side of a triangle to the sine of the opposite angle is equal for all sides and angles of the triangle. In this case, we have:

AC/ sin(B) = AB/ sin(C)

We can plug in the given values and solve for AB:

250 m/ sin(49°52') = AB/ sin(90°)

Simplifying and rearranging, we get:

AB = (250 m * sin(90°))/ sin(49°52')

Using a calculator, we find that sin(90°) = 1 and sin(49°52') ≈ 0.7705. Plugging these values back into the equation, we get:

AB = (250 m * 1)/ 0.7705

AB ≈ 324.35 m

Therefore, the distance from point A to point B, and the length of the bridge, should be approximately 324.35 meters.

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The amount of material, in square inches, needed to create the kite is A = [1/2(6)(8)].2. Option G is the correct answer.

Either of a triangle's two sides that are equal in length is said to be isosceles. This characteristic equates to the triangle's two angles being equal. Two of the sides and two of the angles of an isosceles triangle are equal. An isosceles triangle has three sides that are all the same length, have the same angles, and meet at symmetrical corners. Two right-angle triangles are produced if a perpendicular line is traced from the junction of two equal sides to the base of the unequal side.

The area of the triangle is given as:

A = 1/2(b)(h)

Here, the base = 6 and height = 8 in.

Thus, the area of the triangle is:

A = 1/2(6)(8)

The figure consists of 2 similar triangles. So, the area of the second triangle is added to get the final area.

A = [1/2(6)(8)].2

Hence, the amount of material, in square inches, needed to create the kite is A = [1/2(6)(8)].2. Option G is the correct answer.

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Using synthetic division, the value of g(1) is 37.

To find g(1) using synthetic division, we need to divide the polynomial g(z) by the binomial (z - 1). The process of synthetic division is as follows:

1. Write down the coefficients of the polynomial g(z): 28, -9, -26, 10, 34
2. Write down the value of z that we are plugging in, which is 1, in the leftmost column.
3. Bring down the first coefficient, which is 28, to the bottom row.
4. Multiply the value in the bottom row by the value of z, which is 1, and write the result in the next column.
5. Add the value in the top row to the value in the bottom row and write the result in the bottom row.
6. Repeat steps 4 and 5 until all the columns are filled.
7. The last value in the bottom row is the remainder, and the values in the bottom row before the remainder are the coefficients of the quotient polynomial.

The synthetic division table looks like this:

1 | 28  -9  -26  10  34
|       28   19   -7   3
 | 28  19    -7   3   37

The remainder is 37, so g(1) = 37.

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The center height of the tent is 1.57 meters.

Triangle is a polygon with three sides and three angles. It is one of the basic shapes in geometry. Triangles come in a variety of forms, including equilateral, isosceles and scalene. The sum of the three interior angles of a triangle is always 180°, making it one of the few geometric shapes whose angles add up to a fixed number. Triangles are the strongest shape, making them ideal for construction and engineering projects.

Using the formula for the volume of a triangular prism, V = B x H x L, we can determine the center height, h, of the tent:

V = B x H x L
12.6 = 2.8 x H x 4.5
H = 12.6 ÷ (2.8 x 4.5)
H = 1.57 meters

Therefore, the center height of the tent is 1.57 meters.

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The mean and the standard deviation of the binomial variable are given as follows:

The binomial distribution formula gives the probability of obtaining a specific number of successes in a fixed number of independent trials, where each trial has only two possible outcomes (success or failure) and the probability of success is constant throughout the trials.

The mass probability formula(PMF) is given by the equation presented as follows:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

The parameters, along with their meaning, are listed as follows:

The parameter values for n and p in this problem are given as follows:

n = 3, p = 0.6.

The mean of the binomial distribution is given by the following equation:

E(X) = np.

Hence:

E(X) = 3 x 0.6

E(X) = 1.8.

The standard deviation of the binomial distribution is given by the following equation:

[tex]\sqrt{V(X)} = \sqrt{np(1 - p)}[/tex]

Hence:

[tex]\sqrt{V(X)} = \sqrt{3 \times 0.6 \times 0.4}[/tex]

[tex]\sqrt{V(X)} = 0.8485[/tex]

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Answer: The two triangles created by the bank shot are similar.

Step-by-step explanation: The measures of the triangles are as follows:

Triangle 1:

Angle A = 53.14 degrees, Angle B = 36.86 degrees, Angle C = 90 degrees

Triangle 2:

Angle A = 53.14 degrees, Angle B = 36.86 degrees, Angle C = 90 degrees

Yes, the two triangles are similar.

1). The statement " If in the year 2000 the price index is 120 and the value of the price index in 2001 is 125, it implies that there was a 5% increase in the price level in 2001." is true. Percentage change = (New price index - Old price index) / Old price index x 100, Plugging in the values from the question:Percentage change = (125 - 120) / 120 x 100 = 4.17%. Therefore, there was a 4.17% increase in the price level in 2001. 2). The statement " The weighted aggregate price index assigns a lower weight to the items that are sold in higher quantities." is  False. This is false because these items have a greater impact on the overall price level

The price index measures the change in prices of a basket of goods and services from one period to another. In this case, the price index in 2000 is 120 and the price index in 2001 is 125. To calculate the percentage change in the price level, you can use the formula:

The weighted aggregate price index assigns a higher weight to the items that are sold in higher quantities. This is false because these items have a greater impact on the overall price level. For example, if the price of a popular item, such as gasoline, increases, it will have a greater impact on the overall price level than if the price of a less popular item, such as a luxury car, increases.

Therefore, the weighted aggregate price index assigns a higher weight to the items that are sold in higher quantities to accurately reflect their impact on the overall price level.

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The linear system has a unique solution for all values of a except √(97/13), and infinitely many solutions or no solution for a = √(97/13).

To find the values of a for which the linear system has a unique solution, infinitely many solutions, or no solution, we can use the determinant of the coefficient matrix. The determinant of a 3x3 matrix is given by:

|A| = adg - beh + cfi - 3fci - 2c - 3ebh - 2b - 3dag - 2a

For a unique solution, the determinant of the coefficient matrix must be nonzero. For infinitely many solutions or no solution, the determinant must be zero.

For the given system, the coefficient matrix is:

⎡⎣⎢​1 2 −32 −1 54 1 a2−14​⎤⎦⎥

The determinant of this matrix is:

|A| = (1)(-1)(a2-14) - (2)(5)(4) - (-3)(-1)(1) - (3)(4)(a2-14) - (2)(1)(-3) - (3)(2)(4) - (2)(-1)(-3)

Simplifying this expression gives:

|A| = -a2 + 14 - 40 - 3 - 12a2 + 168 - 6 - 24 - 6

|A| = -13a2 + 97

For a unique solution, |A| ≠ 0:

-13a2 + 97 ≠ 0

13a2 ≠ 97

a2 ≠ 97/13

a ≠ √(97/13)

For infinitely many solutions or no solution, |A| = 0:

-13a2 + 97 = 0

13a2 = 97

a2 = 97/13

a = √(97/13)

Therefore, the linear system has a unique solution for all values of a except √(97/13), and infinitely many solutions or no solution for a = √(97/13).

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Using the given percentage we can see that there are 78 filled pages.

We know that there are 800 cards and each page holds 8 cards, then the number of pages is:

N = 800/8 = 100

And we know that 22% of the album is empty, then 78% (the complement) of the album is filled, this means that the number of filled pages is given by the formula below.

F = 100*(78%/100%) = 100*0.78 = 78

We divide the percentage by 100% to make it a decimal number, so we can use it in the operation.

There are 78 filled pages in the album.

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Answer:

Step-by-step explanation:

There are four methods of sampling namely Random sampling,Stratified sampling, Cluster sampling and Multistage sampling. Let’s look at them one by one.

Random sampling - When each subject of the population is equally likely to be included in the sample, the sampling method is called random sampling.

Stratified sampling- Under this, the data are first divided into stratas. Each stratum consists of homogeneous subjects and strata are heterogeneous among themselves. Samples are randomly taken from each strata. Example- In an investigation of mortality rate of the insured, we can first subdivide the data into males and females and then take sample from each group. Here, male and female groups represent stratas.

Cluster sampling- Under this we first divide the data into clusters that are homogeneous among themselves and then select few of them and sample all observations from the randomly selected clusters. For example- suppose we want to take a sample of people's weight in a specific city. We observed that the areas in that city are similar to each other , so instead of travelling to each area and collecting data we can select few areas and then take observations from all people of those areas.

Multistage sampling - This adds one more stage to cluster sampling. Unlike cluster sampling where we sample all observations from the selected clusters, In multistage sampling we randomly sample observations from each selected cluster.

I hope this helped.

The correct match of each root word with its meaning are :

(i) Anthropology⇔(d) man

(ii) Psychology⇔(c) mind    

(iii) Economy⇔(e) law  

(iv) Democracy⇔(b) people

(v) Judicious⇔(a) judge

The term (i) Anthropology is related to (d) man because,

The term "Anthropology" is called the study of human-societies and cultures and their development.

The term (ii) Psychology is related to (c) mind ,

The term "Psychology" is defined as the scientific-study of behavior and mental processes of mind;

The term (iii) Economy is related to (e) law,

The Economy can be termed as the social science that deals with the production, distribution, and consumption of goods and services and their management.

The economy and practices of commerce are governed by certain laws or principles. So,  the best option to match economy is law.

The term (iv) Democracy is related to (b) people ,

Democracy is defined as system of government by the whole population or all the eligible members of a state, typically through elected representatives.

The term (v) Judicious is related to (a) judge,

The word "judge" is a derived from the word "judicious", which means, showing and using sound judgement.

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The given question is incomplete, the complete question is

Match the below root of each word to its meaning.

(i) Anthropology       (a) judge

(ii) Psychology          (b) people

(iii) Economy             (c) mind

(iv) Democracy         (d) man

(v) Judicious              (e) law

Answer:

Yes.

Step-by-step explanation:

Volume of box:

32 × 20 × 8 = 5,120 cubic centimeters

Volume of each brick:

4^3 = 64 cubic centimeters

5,120 ÷ 64 = 80 bricks

So Sam can fit all 75 bricks into the box.

Answer:

see explanation

Step-by-step explanation:

using the property of exponents

• [tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex]

given

3x²[tex]y^{5}[/tex] × 4x³[tex]y^{7}[/tex] ( separate like parts in the product )

= 3 × 4 × x² × x³ × [tex]y^{5}[/tex] × [tex]y^{7}[/tex]

= 12 × [tex]x^{(2+3)}[/tex] × [tex]y^{(5+7)}[/tex]

= 12[tex]x^{5}[/tex][tex]y^{12}[/tex]

The solution to the equation [tex]82-u=266[/tex] is [tex]u=-184[/tex].

To solve for u in the equation [tex]82-u=266[/tex], we can use the additive property of equality. The additive property of equality states that if you add the same value to both sides of an equation, the equation will still be true.

Step 1: We can start by isolating the variable u on one side of the equation. To do this, we can add u to both sides of the equation:

[tex]82-u+u=266+u[/tex]

Step 2: Simplify the equation by canceling out the u terms on the left side of the equation:

[tex]82=266+u[/tex]

Step 3: Next, we can use the additive property of equality again to isolate the variable u on one side of the equation. To do this, we can subtract 266 from both sides of the equation:

[tex]82-266=266+u-266[/tex]

Step 4: Simplify the equation by canceling out the 266 terms on the right side of the equation:

[tex]-184=u[/tex]

Step 5: The final step is to write the solution in the form of u=____. We can do this by simply switching the sides of the equation:

[tex]u=-184[/tex]

Therefore, the solution to the equation [tex]82-u=266[/tex] is [tex]u=-184[/tex].

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The total number of people that die of the disease after the herd immunity threshold is reached can be determined by looking at the value of the R(t) curve after it reaches the herd immunity threshold.

i) The total population of the Portland-metro area, N, can be determined by looking up the population of the city, county, and other areas that make up the metro area.

ii) To determine the values of a and b, we need to look at the basic reproduction number, R0. For an SIR model, the constant a is equal to the basic reproduction number (R0=4.5), and the constant b is equal to (a/N).

iii) To determine the initial values S(0), I(0) and R(0), we can use the equation S(0)=N-5-0.15N, I(0)=5, and R(0)=0.15N.

iv) To solve the SIR model numerically, we need to create a differential equation for each variable (S, I, and R) and use numerical integration to solve the system. Then, a graph can be created to show the values of S, I, and R over time.

v) From the graph, we can see that the total number of people infected is equal to the peak of the I(t) curve.

vi) The total number of people that die from the disease is equal to the peak of the R(t) curve.

vii) The peak of the outbreak is at the time when the I(t) curve has its highest value.

viii) The outbreak is over when the I(t) curve reaches 0.

ix) The herd immunity threshold is reached when the R(t) curve reaches a value equal to the basic reproduction number (R0).

x) The total number of people that die of the disease after the herd immunity threshold is reached can be determined by looking at the value of the R(t) curve after it reaches the herd immunity threshold.

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The leading term is -6r10; its coefficient is -6. The leading coefficient is -6. The constant term is -5.

Leading term is the term with the highest degree within an expression. It is the most important term and is used to determine the overall behaviour of a function.

The terms, degrees, and coefficients of the given polynomial are as follows:

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The value of x is 9.75

Similar triangles are triangles that have the same shape, but their sizes may vary. All equilateral triangles, squares of any side lengths are examples of similar objects. In other words, if two triangles are similar, then their corresponding angles are congruent and corresponding sides are in equal proportion.

Therefore, the other side of the small triangle = √12²+9² = √ 144+81 = √225 = 15

15/9+x = 12/15

225 = 12(9+x)

225/12 = 9+x

18.75 = 9+x

x = 18.75 -9

x = 9.75

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One possible solution is c1 = 1, c2 = -2, and c3 = 1, which gives us the linear dependence relation A1 - 2A2 + A3 = 0.

A= [ 1 1 1] [ 1 2 3] [ 4 5 6] and v = [ 2 ] [ 3 ] [ -1]​​. To find the image of v under TA, we simply multiply A and v to get:

TA = [ 1 1 1] [ 2 ] = [ 4 ]
[ 1 2 3] [ 3 ] [ 7 ]
[ 4 5 6] [ -1]​​ [ 17 ]

So the image of v under TA is [ 4 7 17 ].

To find vectors w that are different from v but that get mapped to the same image, we can use the equation TA*w = TA*v. Since TA*v = [ 4 7 17 ], we can set up the following system of equations:

1w1 + 1w2 + 1w3 = 4
1w1 + 2w2 + 3w3 = 7
4w1 + 5w2 + 6w3 = 17

Solving this system of equations will give us all the possible vectors w that get mapped to the same image as v. One possible solution is w = [ 1 2 0 ], which is different from v but gets mapped to the same image.

To find all vectors z that get mapped to zero, we can use the equation TA*z = 0. This gives us the following system of equations:

1z1 + 1z2 + 1z3 = 0
1z1 + 2z2 + 3z3 = 0
4z1 + 5z2 + 6z3 = 0

Solving this system of equations will give us all the possible vectors z that get mapped to zero. One possible solution is z = [ -3 2 1 ], which gets mapped to zero under TA.

Finally, to write down a nontrivial linear dependence relation between the columns of A, we can use the equation c1*A1 + c2*A2 + c3*A3 = 0, where A1, A2, and A3 are the columns of A and c1, c2, and c3 are constants. One possible solution is c1 = 1, c2 = -2, and c3 = 1, which gives us the linear dependence relation A1 - 2A2 + A3 = 0.

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