Question

Which inequality is true when X = -8?

-4+ 4x > 20
-7- 4x < 27
8+ 3x>-10
5- 2x 15

Answer 1

2

Remember:

+ and - = -

- and + = -

- and - = +

+ and + = +

1. -4 +(-8) > 20

-4 - 8 > 20

-12 > 20? Incorrect

2. -7 - 4(-8) < 27

-7 + 32 < 27

25 < 27? Correct

3. 8 + 3(-8) > -10

8 - 24 > -10

-16 > -10? Incorrect

4. 5 - 2(-8) < 15

5 + 16 < 15

21 < 15?, Incorrect