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11 May, 03:20

y varies directly as x and inversely as z. If y = 5 when x = 3 and z = 4, find y when x = 6 and z = 8.

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Answers (1)
  1. 11 May, 07:12
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    y = 201/40

    Step-by-step explanation:

    y=k (x:z)

    5 = (3:4) k

    cross multiply

    20=3k

    k = 6.7 or 67:10

    y = 6.7 (x:z) the law

    y = (6:8) * 6.7

    y = 0.75 * 6.7

    y = 5.025 or 201:40
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