Question

If f(x)=-7x+3 andg(x) = x +4, what is the valueof (f•g)(2)?a)-53b) 59 c) -125 d) 292 e)125

Answer 1

the given function is

f(x) = -7x + 3

g(x) = x^2 + 4

(f•g)(x) = f(g(x))

put x = g(x) in the f(x) equation

fog(x) = -7(x^2 + 4 ) + 3

fog(x) = -7x^2 - 28 + 3

put x = 2

fog(2) = -7x2^2 - 25

fog(2) = -28 - 25

fog(2) = -53

thus the answer is option A