Section: Math Section 1

1) What is the average (arithmetic mean) of 4x + 5, 7x-6,and -8x+2?

1. x + 1
2. x + ¹/₃
3. 3x + 1
4. 3x + ¹/₃
5. 3x + 3 ¹/₃

To find the average of three numbers—even if they’re alge-
braic expressions—add them up and divide by 3.
Thus, the average equals:

Step 1:

(4x+5) + (7x-6) + (-8x+2)

3

Step 2:

3x + 1

3

Step 3: x + ¹/₃