5
Answer: ASet 2: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 4x + 2, find x when f(x) = 22.
If f(x) = 4x + 2, find x when f(x) = 22.
A.✓ Correct
5
B.
8
C.
3
D.
6
Detailed Explanation
Choice A is the best answer. 4x + 2 = 22. 4x = 20. x = 5
Why others are wrong:
B: 8 is incorrect because it does not satisfy the equation.
C: 3 is incorrect because it does not satisfy the equation.
D: 6 is incorrect because it does not satisfy the equation.