Question

which inequality is true when x = -2?
a 2x - 1> -4
b 2 - x < 0
c 3x + 5 < 1
d 7 - x > 9

Answer 1

To find which inequality is true when x = -2, we substitute -2 into each inequality:

a) 2(-2) - 1 > -4
-4 - 1 > -4
-5 > -4
This is false.

b) 2 - (-2) < 0
2 + 2 < 0
4 < 0
This is false.

c) 3(-2) + 5 < 1
-6 + 5 < 1
-1 < 1
This is true.

d) 7 - (-2) > 9
7 + 2 > 9
9 > 9
This is false.

Therefore, the correct answer is c) 3x + 5 < 1.