5
Answer: ASet 1: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 2x + 5 and g(x) = 4x + 4, find f(g(4)).
If f(x) = 2x + 5 and g(x) = 4x + 4, find f(g(4)).
A.✓ Correct
45
B.
48
C.
43
D.
44
Detailed Explanation
Choice A is the best answer. g(4) = 4(4) + 4 = 20. f(20) = 2(20) + 5 = 45
Why others are wrong:
B: 48 is incorrect because it does not satisfy the equation.
C: 43 is incorrect because it does not satisfy the equation.
D: 44 is incorrect because it does not satisfy the equation.