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20 May, 04:28

F s (x) = 2 - x2 and t (x) = 3x, which value is equivalent to (s*t) (-7)

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  1. 20 May, 06:31
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    S (x) = 2 - x²

    t (x) = 3x

    s (t (x)) = st (x)

    s (t (x)):

    s (3x)

    So in s (x) = 2 - x², to solve for s (3x) we replace x with 3x

    s (x) = 2 - x²

    s (3x) = 2 - (3x) ²

    = 2 - 9x²

    st (x) = 2 - 9x²

    st (-7) = 2 - 9 * (-7) (-7)

    = 2 - 9*49 = 2 - 441 = - 439

    st (-7) = - 439
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