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::x:5
ratio of 15 to 45 colon colon ratio of x to 5

15x=455
Start Fraction 15 over x End Fraction equals Start Fraction 45 over 5 End Fraction

1545=x5
Start Fraction 15 over 45 End Fraction equals Start Fraction x over 5 End Fraction

1545=5x

Answer 1

To find the cost of 5 gallons of gas using a proportion, you can set it up in fractional notation like this:

\[ \frac{15}{45} = \frac{x}{5} \]

This proportion shows that the ratio of gallons of gas to cost remains constant. Therefore, your correct answer is:

Start Fraction 15 over 45 End Fraction equals Start Fraction x over 5 End Fraction