Question

David washes cars for $15 each and trucks for $25 each.

Write an equation that represents the amount of money

Answer 1

earnings = 15x +25y

Explanation:

You want an equation that represents the amount of money David earns for washing cars for $15 each and trucks for $25 each.

Variables

Let x represent the number of cars David washes, and y the number of trucks.

Revenue

David's revenue from washing vehicles will be 15x from washing cars, and 25y from washing trucks. It is the revenue for washing one vehicle times the number of vehicles. His total revenue will be the sum of these values.

Total earnings

The total amount David earns is then ...

earnings = 15x +25y