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algebra

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The average gas consuption of Angels SUV is 21 miles per gallon. Jeffs car takes 20% less gas to drive the same distance. If Angel and Jeff drove from Sacramento to Phoenix a distance of 570 miles, how many gallons of gas would each need?

  • algebra -

    Jeffs car takes 20% less gas, so it gets 21/(1-0.2) miles per gallon.

    To drive 570 miles at 21 miles per gallon requires 570/21 gallons.

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