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Valentin [98]
3 years ago
8

The director of marketing at a large company wants to determine if the amount of money spent on internet marketing is a good pre

dictor 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.
Mathematics
1 answer:
san4es73 [151]3 years ago
3 0
Given:
Profit = 372.60 + 17.2(advertising dollars)
Advertising dollars = 1,020
profit = 17,500

17,500 + residual value = 372.60 + 17.2(1,020)
17,500 + residual value = 372.60 + 17,544
17,500 + residual value = 17,916.60
residual value = 17,916.60 - 17,500
residual value = 416.60

residual value is 416.60 or 417 rounded off to the nearest integer
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Answer: 2x -5

Step-by-step explanation:

Hi, to answer this question we have to write equations with the information given:

  • <em>John has × marbles  </em>

John=x

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We have to multiply by 2 the number of marbles that John has (x), and subtract 5.  

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Feel free to ask for more if needed or if you did not understand something.  

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As per the problem,

Rhonda bought a new laptop for $800.

The laptop depreciates, or loses, 20% of its value each year.

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Here we have

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Substitute the values in equation (1) we get

A=800(1-0.2)^2\\ \\ \Rightarrow A=800(0.8)^2\\ \\ \Rightarrow A=800*0.64\\ \\ \Rightarrow A=512\\

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