College Algebra 2

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Find the equation of variation in which y varies jointly as x and z and y=8, x=4 and z=2

  • College Algebra 2 -

    if a varies directly with b, then it means

    a = k*b

    If y varies jointly as x & z, then it means y = k * x * z

    So, if 8 = k * 4 * 2

    Then k = 1, and y = x*z

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