Solve.A car traveled 255 miles on a trip. During 60 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 7 gallons, find the gas mileage of the car on the highway.
A. 21 miles per gallon
B. 30 miles per gallon
C. 48 miles per gallon
D. 39 miles per gallon
Answer: D
Mathematics
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