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23 March, 09:59

If f (x) = 3x - 7 and g (x) = - x2, what is

the value of f (g (2)) ?

What is answer

+4
Answers (2)
  1. 23 March, 10:13
    0
    You would have to plug in g (x) into every x in f (x):

    f (g (x)) = 3 (-x^2) - 7

    Then you can plug in 2 for x since it's asking for f (g (2)):

    f (g (2)) = 3 (2^2) - 7

    Now you just have to solve:

    f (g (2)) = 3 (4) - 7

    f (g (2)) = 12 - 7

    f (g (2)) = 5

    So the answer is 5.
  2. 23 March, 10:15
    0
    D

    Step-by-step explanation:

    f (x) = 3x - 7 and g (x) = - x^2,

    : f (-x^2) = 3x - 7

    f (-x^2) = 3 (-x^2) - 7

    = - 3x^2 - 7

    the value of f (g (2)) = - 3 (2^2) - 7

    = - 3 (4) - 7

    = - 12 - 7

    = - 19
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