Which of the following is not an equivalent form of the compound inequality x + 8 20 and x + 8 less than or greater to 28 20

Question

Which of the following is not an equivalent form of the compound inequality

x + 8 > 20 and x + 8 less than or greater to 28

20 < x + 8 less than or greater to 28

12 < x and x less than or greater to 20

A number line with an open circle on 12, shading to the left, and a closed circle on 20, shading to the right.

A number line with an open circle on 12, a closed circle on 20, and shading in between.

anonymous · Answer

Is that less than or greater than supposed to be less than or equal to?