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1 September, 10:58

Randy can buy 6 gallons of gas for $18 or 7 gallons of gas for $21. How much do you think he would pay for 8 gallons of gas? A) $22 B) $23 C) $24 D) $25

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  1. 1 September, 12:53
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    Well, we want to find how much it would cost for 1 gallon, the easiest way to do that is subtract 21 from 18.

    21 - 18 = 3

    So, it's 3 dollars per gallon. Now that we know that we multiply it by 8 to find how much it would cost.

    8 x 3 = 24

    Eight gallons of gas would cost 24$ : D
  2. 1 September, 13:09
    0
    There are several ways to solve this. First, you can divide $18 by 6, which is $3, to find the price for one gallon, then multiply this by 8 (so the total would be $24).

    Or, you can use this less conventional and more complicated method to try to impress your teachers with how smart you are: Multiply the price for 6 gallons by 4, to find the price for 24 gallons ($18*4=$72), then divide it by 3 (since 8*3=24) to find the price for 8 gallons. This is $72/3=$24.
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