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March 25, 2017

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a trip of 120 miles required 7 gallons of gas. at this rate how many gallons would be needed at 180?

  • algebra - ,

    let x = gallons needed
    120 : 7 = 180 : x , or
    120/7 = 180/x
    x/7 = 180/120
    x = 7*3/2
    x = 10.5 gallons

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