Answer:
Explanation:
The idea is to find out after what number car washed will they begin to make money. That means that this is an inequality. If they charge $5 per car, and the number of cars is our uknown, then the expression for that charge is 5x. If they need to make more than what they spent on setting up, they want to make more than $75, which looks like this: > 75. Putting that together:
5x > 75 and solving for x,
x > 15.
That means that they have to wash 15 cars to just break even and starting on the 16th car on up, they will see a profit.