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March 27, 2017

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If x is inversely proportional to y, and x=60 when y=0.5, find x when y =12

  • algebra - ,

    x is inversely proportional to y ---> x = k/y

    if x=60, then y=0.5
    60 = k/.05
    k = 3

    so x = 3/y or xy = 3

    when y = 12
    12x = 3
    x = 3/12 = 1/4

    I did this very systematically, you can shorten it up a bit

  • algebra - ,

    my choices are 0.4, 25, 2.5, or 360.
    so, is the answer 0.4 or 25?

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