8
Answer: DSet 1: Function Notation (Beginner)
Explanation
PROBLEM
If f(x) = 5x + 7, find f(5).
If f(x) = 5x + 7, find f(5).
A.
31
B.
33
C.
35
D.✓ Correct
32
Detailed Explanation
Choice D is the best answer. f(5) = 5(5) + 7 = 25 + 7 = 32
Why others are wrong:
A: 31 is incorrect because it does not satisfy the equation.
B: 33 is incorrect because it does not satisfy the equation.
C: 35 is incorrect because it does not satisfy the equation.