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29 January, 11:37

Sandra's dog weighs 3 1/2 pounds. Each dog he gains 2/3 of a pound. If he continues to gain this much weight each week, how much will he weigh in 8?

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  1. 29 January, 11:54
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    Multiply the weight gain per week by the number of weeks, then add it to the staring weight.

    2/3 lb x 8 week = 16/3 = 5 1/3 pounds.

    Since both fractions have different denominators, convert the weights to improper fractions, then turn them into fractions with a common denominator then simplify:

    3 1/2 = 7/2

    5 1/3 = 16/3

    Common denominator is 6:

    7/2 * 3 = 21/6

    16/3 x 2 = 32/6

    Now add:

    21/6 + 32/6 = 53/6

    No convert back to proper fraction:

    53/6 = 8 5/6 pounds.
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