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15 June, 11:39

F (x) = 4x - 1

g (x) = x2 - 2

(f + g) (9) = ?

A. 118

B. 112

C. 119

D. 114

E. 116

F. 111

G. 110

H. 115

I. 113

J. 117

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Answers (2)
  1. 15 June, 12:28
    0
    J. 117

    Step-by-step explanation:

    f (x) = 4x-1

    if f (2) = 4 (2) - 1

    f (2) = 8-1 = 7

    f (2) = 7 equation 1

    g (x) = x2-2

    if g (4) = (4) 2-2

    g (4) = 8-2 = 6 equation 2

    Now,

    (f+g) (9) = ?

    subtitute equation 1 and 2

    (7+6) (9) = ?

    (13) (9) = ?

    13*9 = 117

    Hence, the answer is 117
  2. 15 June, 13:02
    0
    D

    Step-by-step explanation:

    Find (f + g) (x) then evaluate (f + g) (9)

    (f + g) (x) = f (x) + g (x)

    = 4x - 1 + x² - 2 = x² + 4x - 3

    Now substitute x = 9 into the expression

    (f + g) (9) = 9² + 4 (9) - 3 = 81 + 36 - 3 = 114 → D
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