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12 March, 06:58

Lisa start her trip with 11 1/2 of gallons of gas in her cars Gas tank she bought an additional 6 4/5 gallons on her trip in and arrived back home with 3 3/10 gallons left how much gas does she use on her trip

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Answers (2)
  1. 12 March, 07:03
    0
    She uses 15 gallons of gas.

    11 1/2 + 6 4/5 =

    23/2 + 34/5 =

    115/10 + 68/10 =

    183/10 =

    183/10 - 3 3/10 =

    183/10 - 33/10 =

    150/10 =

    15
  2. 12 March, 07:06
    0
    Quantity of gas in the tank with which Lisa started her journey = 11 1/2 gallons

    = 23/2 gallons

    Quantity of gas additionally bought by Lisa during her trip = 6 4/5 gallons

    = 34/5 gallons

    Quantity of gas still left in the car after Lisa completed her trip = 3 3/10 gallons

    = 33/10 gallons

    Then

    Quantity of gas used by Lisa during her trip = [ (23/2) + (34/5) ] - (33/10) gallons

    = [ (115 + 68) / 10] - (33/10) gallons

    = (183/10) - (33/10) gallons

    = 150/10 gallons

    = 15 gallons

    So we can see from the above deduction that Lisa used 15 gallons of gas during her trip. I hope the procedure is simple enough for you to understand.
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