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10 December, 06:51

What is the value of f (?3) + f (7) f (-3) + f (7) when f (x) = ?3x+9 f (x) = -3x+9? 18 6 - 6 - 12

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  1. 10 December, 07:59
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    The correct answer is 6.

    Step-by-step explanation:

    To find this, first find f (-3)

    f (x) = - 3x + 9

    f (-3) = - 3 (-3) + 9

    f (-3) = 9 + 9

    f (-3) = 18

    Now we do the same for f (7)

    f (x) = - 3x + 9

    f (7) = - 3 (7) + 9

    f (7) = - 21 + 9

    f (7) = - 12

    Now we add them together

    18 + - 12 = 6
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