You fill your car with 15 gallons of gas at a cost of $45. Using fractional notation, how do you write a proportion that shows how much 5 gallons of gas will cost? Use x

Question

to represent the unknown cost.(1 point)
Responses

15/45=5/x

15/x=45/5

15:45::x:5

15/45=x/5

Answer 1

To write a proportion that shows how much 5 gallons of gas will cost using \( x \) to represent the unknown cost, the correct choice is:

15/45 = 5/x

This maintains the equivalency of the ratio of gallons to cost.