10
Answer: ASet 2: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 2x + 3 and g(x) = 4x + 5, find f(g(7)).
If f(x) = 2x + 3 and g(x) = 4x + 5, find f(g(7)).
A.✓ Correct
69
B.
68
C.
71
D.
72
Detailed Explanation
Choice A is the best answer. g(7) = 4(7) + 5 = 33. f(33) = 2(33) + 3 = 69
Why others are wrong:
B: 68 is incorrect because it does not satisfy the equation.
C: 71 is incorrect because it does not satisfy the equation.
D: 72 is incorrect because it does not satisfy the equation.
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