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F (*) = -3x+7, what is the value of f (1) f (-8)

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  1. 8 July, 09:39
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    Use the substitution method

    f (x) = - 3x+7

    f (1) = - 3 (1) + 7

    = - 3+7

    = - 4

    f (-8) = - 3 (8) + 7

    = - 24+7

    = - 17

    Answers:

    f (1) = - 4, f (-8) = - 17
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