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20 March, 04:56

Given the functions a (x) = 3x - 12 and b (x) = x - 9, solve a[b (x) ] and select the correct answer below.

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  1. 20 March, 05:26
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    A (x) = 3x - 12

    b (x) = x - 9

    Substitute x of a (x) equation with the value of b (x).

    a[b (x) ] = 3[b (x) ] - 12

    a[b (x) ] = 3 (x-9) - 12

    a[b (x) ] = 3x - 27 - 12

    a[b (x) ] = 3x - 39

    a[b (x) ] = 3 (x - 13)
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