Question

Courtney must earn at least $150 to pay for broken window. She earns $10 for every car she washes.

What is an inequality that can be used

find the number of cars, c, Courtney needs to wash?


Fill in the boxes to correctly complete the inequality.


__c__ __

Answer 1

10c ≥ 150

At least 15 cars (or c ≥ 15)

Explanation:

If she gets $10 for every car she washes a car then 10c is the rate of her gaining money and she needs at least (greater than or equal to) $150.

This equation can be used to express the situation:

10c ≥ 150

To solve you divide the 10 from both sides of the inequality to get.

c ≥ 15