Question

A valet makes $79 each day that he works and makes approximately 9 in tips for each car that he parks . If he wants to make at least $169 in one day, at least how many cars does he need to park

Answer 1

The valet needs to park 10 or more cars each day to earn at least $169/day.

Explanation:

The valet's income for a day is composed of a set salary of $79 plus tips of $9/car. If we say x is the number of cars the valet parks each day, we can write:

Daily Income = $79/day + ($9/car)*x

If the valet wants to earn at least $169 in a day, we can enter that amount in the equation:

Daily Income = $79/day + ($9/car)*x

$169/day = $79/day + ($9/car)*x

Rearrange to find x:

$79/day + ($9/car)*x = $169/day

($9/car)*x = $90/day

x = 10 cars/day

The valet needs to park 10 cars each day to earn $169/day. He needs more than 10 to earn more than $169.