Question

Devin has decided to paint the two rooms in his house. Devin found a local advertisement in the newspaper that advertises 2 cans of paint for 7 dollars.

If Devin needs 9 cans of paint, how much will he need to pay?

Answer 1

Given parameters:

Rate;

2 cans of paint for 7 dollars

Number of cans of paints = 9 cans

Unknown:

Cost of 9 cans of paints = ?

This is rate - work problem. So therefore, we can simply solve them;

Since;

2 cans of paint costs 7 dollars

9 cans of paint will now cost
`(9 cans x 7 dollars)/(2 cans)` = $31.5

The cost of 9 cans of paint is $31.5