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28 August, 20:23

What is the value of k in the function ƒ (x) = 112 - kx if ƒ (-3) = 121?

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  1. 28 August, 21:12
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    f (x) = 112 - kx

    f (-3) = 112 - k (-3)

    f (-3) = 112 - (-3k)

    f (-3) = 112 + 3k

    121 = 112 + 3k

    - 112 - 112

    9 = 3k

    3 3

    3 = k
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