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If f(x) = 9x – 7 and g(x) = 2x2 – 3x + 1, what is (f + g)(4)? a. -8 b. 8 c. 34 d. 50
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If f(x) = 9x – 7 and g(x) = 2x2 – 3x + 1, what is (f + g)(4)?

a. -8
b. 8
c. 34
d. 50

User Dan Berindei
by
6.1k points

1 Answer

3 votes

Answer:

D. 50

Explanation:


f(x) = 9x - 7 \\ g(x) = 2x {}^(2) - 3x + 1 \\( f + g)(x) = 9x - 7 + (2x {}^(2) - 3x + 1) \\ (f + g)(x) = 2x {}^(2) + 6x - 6 \\ (f + g)(4) = 2(4 ){}^(2) + 6(4) - 6 \\ (f + g)(4) = 32 + 24 - 6 \\ (f + g)(4) = 56 - 6 \\ (f + g)(4) = 50

User Anatoly Scherbakov
by
5.7k points
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