Question

1. Which of the following expressions has asimplified value of 10x - 13?A. -7x + 3x - 16+3B.-21x + 4 + 11x + 9C. X-10 + 9x - 3D. -2x + 8x - 20 + 7

Answer 1

Answer:

C. x - 10 + 9x - 3

Explanation:

We need to simplify each option, so we need to identify the like terms and then add them.

Option A.

- 7x + 3x - 16 + 3

(- 7x + 3x) + ( - 16 + 3)

- 4x + (-13)

- 4x - 13

Option B.

-21x + 4 + 11x + 9

(-21x + 11x) + (4 + 9)

-10x + 13

Option C.

x - 10 + 9x - 3

( x + 9x) + (-10 - 3)

10x + (-13)

10x - 13

Option D.

-2x + 8x - 20 + 7

(-2x + 8x) + (-20 + 7)

6x + (-13)

6x - 13

Therefore, the answer is C. x - 10 + 9x - 3