Question

Marcus earns $40 per day plus $7 for every sale he makes. On Friday, he wants to earn at least $75. Which best describes the number of sales he needs to make to reach his goal? *

A. At least 5 sales
B. At most 5 sales
C. At least 6 sales
D. At most 6 sales

Answer 1

A. At least 5 sales

Explanation:

First off, we can get rid of two of the answers, reason being is that we need the equation to be greater then or equal to a number, which means that we don't need an "at most" answer.

This leaves us with two options; A. and C.

Then we solve the inequality; 40 + 7s
`\geq` 75.

40 + 7s
`\geq` 75

subtract 40 from each side

7s
`\geq` 35

divide each side by 7.

s
`\geq` 5

This means that he has to make at least 5 sales in order to reach his goal. Which is A.

Answer 2

A. At least 5 because if he sells 5 that will be 35 dollars extra 35+40 =75