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28 November, 10:19

Find f (-4) if f (x) = 3x - 6.

A 6

B - 6

C 18

D - 18

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Answers (2)
  1. 28 November, 11:41
    0
    D. - 18

    Step-by-step explanation:

    f (-4) = 3 (-4) - 6 Substitute - 4 for x

    f (-4) = -12-6 Multiply 3 and - 4

    f (-4) = -18 Subtract 6 from - 12
  2. 28 November, 12:11
    0
    f (-4) = - 18

    Step-by-step explanation:

    f (-4) means x = - 4

    So Plug in x = - 4 into f (x) = 3x - 6

    f (-4) = 3 (-4) - 6

    = - 12 - 6

    = - 18

    So

    f (-4) = - 18
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