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7 May, 05:52

If y varies inversely as x, and y = 10 when x = 20,

find x when y = 16.

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Answers (1)
  1. 7 May, 06:06
    0
    12.5

    Step-by-step explanation:

    y varies inversely as x.

    y = k/x

    10 = k/20

    200 = k

    The constant proportion k is 200.

    16 = 200/x

    Cross multiply.

    200 = 16x

    200/16 = x

    x = 12.5
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