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12 May, 04:50

Miranda and Jean are planning a trip together. They want to drive, but they're not sure whose car to take. Jean's car uses 5/12 gallons of gasoline to travel 12 1/2 miles. Miranda's car can go 20 5/7 miles on 5/7 gallons of gasoline. Whose car is more fuel efficient, and what is the car's fuel efficiency in miles per gallon? is more fuel efficient. Her car gets miles per gallon.

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  1. 12 May, 05:15
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    Jean's car:

    (12 1/2) / (5/12) =

    (25/2) / (5/12) =

    25/2 * 12/5 =

    150/5 =

    30 miles per gallon

    Miranda's car:

    (20 5/7) / (5/7) =

    (145/7) / (5/7) =

    145/7 * 7/5 =

    145/5 =

    29 miles per gallon

    most fuel efficient is Jean's car ... it gets 30 miles per gallon
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