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14 May, 23:39

Sarah lost 12 pounds over the summer by jogging each week. By winter time, she had gained 4 3/8 pounds. Represent this situation with an expression involving signed numbers. What is the overall change in Sara's weight.

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  1. 15 May, 01:35
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    Assume sarah's weight is m.

    first, she lost 12 pounds,

    this means that her weight became: m - 12 pounds

    then, she gained 4 3/8 pounds, therefore, her current weight is: m-12+4 3/8 pounds

    the total change in her weight is:

    -12+4 3/8 = - 7.625 pounds

    the negative sign refers to the loss.

    this means that the overall change is losing 7.625 pounds
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