You fill your car with 15 gallons of gas at the cost of $45 he's in fractional notation how do you rate a proportion that shows how much 5 gallons of gas will cost use x to represent the unknown cost
To set up a proportion, we can use the formula:
(15 gallons) / ($45) = (5 gallons) / (x)
Cross multiplying, we get:
15x = 45 * 5
15x = 225
Dividing by 15 on both sides, we get:
x = 225 / 15
x = 15
Therefore, 5 gallons of gas will cost $15.