Solve.
-A car traveled 243 miles on a trip. During 63 miles of the trip, the car traveled through the city and had gas mileage that was 9 fewer miles per gallon than the gas mileage on the highway. If the total Amount of gasoline used for the trip was 9 gallons, find the gas mileage of the car on the highway.
A) 12 miles per gallon
B) 21 miles per gallon
C) 30 miles per gallon
D) 39 miles per gallon

Question

Quizplus · Accepted Answer

Let the gas mileage on the highway be x miles per gallon. Then, the gas mileage in the city is x - 9 miles per gallon. The total distance traveled is 243 miles, with 63 miles through the city and the remaining 180 miles on the highway. The total amount of gasoline used is 9 gallons. We can set up the equation: (63/(x-9)) + (180/x) = 9. Solving for x gives us the highway mileage of 30 miles per gallon.

Solve. -A Car Traveled 243 Miles on a Trip. During 63