3
Answer: CSet 2: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 1x + 4 and g(x) = 3x + 5, find g(f(5)).
If f(x) = 1x + 4 and g(x) = 3x + 5, find g(f(5)).
A.
30
B.
29
C.✓ Correct
32
D.
34
Detailed Explanation
Choice C is the best answer. f(5) = 1(5) + 4 = 9. g(9) = 3(9) + 5 = 32
Why others are wrong:
A: 30 is incorrect because it does not satisfy the equation.
B: 29 is incorrect because it does not satisfy the equation.
D: 34 is incorrect because it does not satisfy the equation.