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Answer: ASet 1: Function Notation (Advanced)
Explanation
PROBLEM
If f(x) = 6x + 3, find x when f(x) = 45.
If f(x) = 6x + 3, find x when f(x) = 45.
A.✓ Correct
7
B.
10
C.
5
D.
6
Detailed Explanation
Choice A is the best answer. 6x + 3 = 45. 6x = 42. x = 7
Why others are wrong:
B: 10 is incorrect because it does not satisfy the equation.
C: 5 is incorrect because it does not satisfy the equation.
D: 6 is incorrect because it does not satisfy the equation.