8
Answer: CSet 3: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 3x + 5 and g(x) = 3x + 5, find f(g(5)).
If f(x) = 3x + 5 and g(x) = 3x + 5, find f(g(5)).
A.
63
B.
66
C.✓ Correct
65
D.
62
Detailed Explanation
Choice C is the best answer. g(5) = 3(5) + 5 = 20. f(20) = 3(20) + 5 = 65
Why others are wrong:
A: 63 is incorrect because it does not satisfy the equation.
B: 66 is incorrect because it does not satisfy the equation.
D: 62 is incorrect because it does not satisfy the equation.