7
Answer: CSet 4: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 3x + 4 and g(x) = 3x + 3, find f(g(6)).
If f(x) = 3x + 4 and g(x) = 3x + 3, find f(g(6)).
A.
69
B.
64
C.✓ Correct
67
D.
66
Detailed Explanation
Choice C is the best answer. g(6) = 3(6) + 3 = 21. f(21) = 3(21) + 4 = 67
Why others are wrong:
A: 69 is incorrect because it does not satisfy the equation.
B: 64 is incorrect because it does not satisfy the equation.
D: 66 is incorrect because it does not satisfy the equation.