Mathematics, 06.07.2019 16:30 joooosshhhh

Solve and explain how you got the answer : seven days ago, the gas tank on rosa’s car was filled with 20 gallons of gasoline. today there are 6 gallons of gasoline. what is the fuel efficiency, in miles per gallon, of rosa’s car if she drove 490 miles in the past 7 days?

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