7
Answer: CSet 3: Function Notation (Intermediate)
Explanation
PROBLEM
If f(x) = 3x + 2, find x when f(x) = 29.
If f(x) = 3x + 2, find x when f(x) = 29.
A.
6
B.
12
C.✓ Correct
9
D.
11
Detailed Explanation
Choice C is the best answer. 3x + 2 = 29. 3x = 27. x = 9
Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
B: 12 is incorrect because it does not satisfy the equation.
D: 11 is incorrect because it does not satisfy the equation.