True is the correct answer.
Answer:

Step-by-step explanation:
The function is given.

To find : 
The input for the function f(x) is (a + 1).
Replace x with (a + 1).

Expand brackets.

Simplifying.

The discounts on a pair of shoes with a regular price of $48 is 24
<span>x+2 = -x+6
</span>2x+2 = 6
2x = 4
x = 2