Question

The cost of gasoline varies directly with the number of gallons bought. If 5 gallons of gasoline cost $18.00, find the cost of 20 gallons.

Answer 1

20 gallons = $72

Explanation:

Divide 18 by 5 to find the cost per gallon.

18 / 5 = $3.60

1 gallon = $3.60

Multiply $3.60 by 20 gallons.

3.60 * 20 = 72

Thus, 20 gallons is $72.