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19 December, 21:58

Suppose y varies jointly with x and z. If y=20 when x=2 and z=5, find y when x=14 and z=8.

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Answers (2)
  1. 20 December, 00:30
    0
    Step-by-step explanation:

    y ∞xz

    y = kxz

    Where k is the constant of proportionality

    y=20 when x=2 and z=5

    20 = k * 2*5

    20 = 10k

    k = 20/10

    k = 2

    : - y = 2xz

    find y when x=14 and z=8.

    y = 2*14*8

    y = 224
  2. 20 December, 00:56
    0
    K=2, y=224

    Step-by-step explanation:

    Y (proportional sign) xz

    Y=kxz

    20=k*2*5

    10k=20

    K=2

    Find y when x=14andz=8

    Y=2xz

    Y=2*14*8

    Y=224
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