Question

If x=7, which inequality is true?

Answer 1

B

Explanation:

Substitute x =7 in each inequality

In A.

`- 4 + 3 * 7 < 17 \\ - 4 + 21 < 17 \\ \\ - 17 < 17`

Which is not true

B.

`- 7 - 2 * 7 > 1 \\ - 7 - 14 > 1 \\ - 21 > 1`

Which is not true.

C.

`5 - 7 \leqslant 9 \\ - 2 \leqslant 9`

Which is true

D.

`1 - 4 * 7 \geqslant 25 \\ 1 - 28 \geqslant 25 \\ - 27 \geqslant 25 \\`

Which is not true

so option C is the right answer