Answer:
1. 3x + 40
2. x + 2
3. A: 2x + 4x + 8x, D: x (2 + 4 + 8)
Explanation:
1. 5 (x + 8) - 2x
= 5x + 40 - 2x
= 3x + 40
2. 2 (3x + 1) - 5x
= 6x + 2 - 5x
= x + 2
3. Imagine if x = 2.
A. 2x + 4x + 8x
2 (2) + 4 (2) + 8 (2)
= 4 + 8 + 16
= 28
D. x (2 + 4 + 8)
= 2 (2 + 4 + 8)
= 2 (14)
= 28
Therefore, answer choices A and D are the correct answer.