The director of marketing at a large company wants to determine if the amount of money spent on internet marketing is a good predictor of company profit. She fits a least-squares regression line to 20 months of data and computes the following regression line:Profit = 372.6 + 17.2(advertising dollars)
What is the value of the residual for advertising dollars spent equal to $1,020 and Profit equal to $17,500? Round to the nearest integer.

Answers

Answer 1

Answer: Given:
Profit = 372.6 + 17.2(advertising dollars)
advertising dollars = 1,020
profit = 17,500

Profit = 372.6 + 17.2(advertising dollars)

We'll just input the amount specified in the equation.
17,500 = 372.6 + 17.2 (1020)
17,500 = 372.6 + 17,544
17,500 = 17,916.60

As you can see, the values do not equal. Its difference is the residual value.

17,916.60 - 17,500 = 416.60 residual value

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In which quadrant is the number -14 – 5i located on the complex plane? a.I b.II C.III D IV

2x + y = -2x + y = 5

The x-coordinate of the solution to the system shown is _____.

Answers

The x-coordinate of the solution to the system shown is -7.

Proof:
From the 2nd equation, equate in terms of y:
y = 5 - x
Then substitute it to the first equation:
2x + 5 - x = -2
2x - x = -2 -5
x = -7

Write an algebraic equation for the following. The product of three and a squared number is twice the sum of the number and four.

Answers

3*x^2 = 2*(x+4)

x is the unknown number

Rick used 4 2/3 yards of fabric to sew 3 1/2 shirts. what is the unit rate of cloth he used in terms of yards per shirt

Answers

For sewing 3 1/2 shirts, he used = 4 2/3 yards of fabric
Then, for 1 shirt, it would be: 4 2/3 / 3 1/2

Fabric for 1 shirt = 14/3 / 7/2
We can re-write it as: 14/3 * 2/7 = 4/3 yards

In short, Final answer would be 4/3 or 1 1/3 yards

Hope this helps!

OMG CAN SOMEBODY PLEASE HELP ME PLLLLLLLLLLLSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Graduate Management Aptitude Test (GMAT) scores are widely used by graduate schools of business as an entrance requirement. Suppose that in one particular year, the mean score for the GMAT was 476, with a standard deviation of 107.

What values are two standard deviations above and below the mean?

Answers

So we want to start at 476. Then subtract and add 107 to find the standard deviation increments above and below.
476-107=369
369-107=199
199-107=29

The values that are two standard deviations above and below the mean are 690 and 262, respectively

How to determine the values?

The given parameters are:

Mean = 476

Standard deviation = 107

The values above and below the mean are calculated using:

$x = \bar x \pm n\sigma$

In this case n =2.

So, we have:

$x = \bar x \pm 2\sigma$

The value above is:

x = 476 + 2 * 107 = 690

The value below is:

x = 476 - 2 * 107 = 262

Hence, the values that are two standard deviations above and below the mean are 690 and 262, respectively

Read more about mean and standard deviations at:

brainly.com/question/16030790

#SPJ5

The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $2.70. Today they made $119.60 from the 72 wraps sold. How many of the wraps sold were vegetarian

Answers

Answer:

vegetarians= 28

chickens= 44

Step-by-step explanation:

let the number of vegetarians be x

and chickens be y

x+2.7y=119.6----------1

x+y=72--------------2

from 2, x= 72-y

put x= 72-y in 1

72-y+2.7y=119.6

-y+2.7y=119.6-72

1.7y=47.6

divide both sides by 1.7

y=47.6/1.7

y=28

put y=28 in 1

x+28=72

y= 72-28

y=44

For the function y = 4x – 11, what is the output when the input is 10?

Answers

= 4x - 11

x is the input, y is the output.

So if you want to know what input is needed to get an output of 10, set y to 10 and solve for x:

10 = 4x - 11

21 = 4x

x = 21/4

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