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Answer: BSet 3: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 3x + 5 and g(x) = 3x + 4, find f(g(7)).
If f(x) = 3x + 5 and g(x) = 3x + 4, find f(g(7)).
A.
81
B.✓ Correct
80
C.
83
D.
82
Detailed Explanation
Choice B is the best answer. g(7) = 3(7) + 4 = 25. f(25) = 3(25) + 5 = 80
Why others are wrong:
A: 81 is incorrect because it does not satisfy the equation.
C: 83 is incorrect because it does not satisfy the equation.
D: 82 is incorrect because it does not satisfy the equation.