Question

The real numbers greater than or equal to 5 or less than or equal to -5

Answer 1

x <= -5 or x >= 5.

Explanation:

The boundary values (-5) and (5) contain closed circles to show that these values are included in the solution sets for the given inequalities.

Had our given compound inequality been:

x < -5 or x > 5

Then the boundary values (-5) and (5) would have contained open circles to show that these values are not included in the solution sets for these inequalities.