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9 April, 04:44

Roys car gets an average gas mileage of 29mi/gal. Roy starts his trip with 12 gal of gas. How many gallons of gas are left after a 140 mile trip? (only an algebraic solution can receive full credit)

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  1. 9 April, 05:18
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    The answer is 208. The equation to get this is m=29g-140 where m is miles and g is the gallons. Plug 12 in for g and solve for m. 29 * 12 = 348, 348-140 = 208. Therefore, m=208.
  2. 9 April, 07:52
    0
    You can use a ratio to solve this.

    29/1 = 140/x

    Cross multiply

    29x = 140

    x = about 4.8 gallons after the trip
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