A car’s fuel economy is 25 miles per gallon. If you drive 150 miles, how many gallons are used?

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Multiple Choice

A car’s fuel economy is 25 miles per gallon. If you drive 150 miles, how many gallons are used?

Explanation:
Understanding fuel economy lets you figure out how much fuel you need by using the miles-per-gallon rate. If a car gets 25 miles per gallon, each gallon covers 25 miles. To travel 150 miles, divide the distance by the fuel efficiency: 150 ÷ 25 = 6. The units work out because miles cancel with miles per gallon, leaving gallons. You can also check by multiplying back: 6 gallons × 25 miles per gallon = 150 miles. The other numbers would correspond to traveling 125, 175, or 100 miles with the same amount of fuel, so they don’t fit the 150 miles given.

Understanding fuel economy lets you figure out how much fuel you need by using the miles-per-gallon rate. If a car gets 25 miles per gallon, each gallon covers 25 miles. To travel 150 miles, divide the distance by the fuel efficiency: 150 ÷ 25 = 6. The units work out because miles cancel with miles per gallon, leaving gallons. You can also check by multiplying back: 6 gallons × 25 miles per gallon = 150 miles. The other numbers would correspond to traveling 125, 175, or 100 miles with the same amount of fuel, so they don’t fit the 150 miles given.

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