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44 votes
44 votes
Given the definitions of f(x) and g(x) below, find the value of g(f(5)).

f(x) = 2x – 10
g(x) = x^2 + 6x – 8

I don’t need work I am just looking for the answer !

User Seb Charrot
by
2.6k points

1 Answer

15 votes
15 votes

gf(x) = g(x^-1) = x^2 + 6x - 8

f(x) = 2x - 10

gf(x) = 6 ( 2x - 10) - 8

gf(x) = 12x- 60 - 8

gf(x) = 12x -68

gf(5) = gf(x) = 12x - 68

gf(5) = 12(5) - 68

gf(5) = 60 - 68

gf(5) = -8

User Bsegraves
by
2.4k points
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