1 answer
(click or scroll down)
The number line that represents the solution of 4x - 9 ≥ -21 would be:
-9 -------- -6 ------- -3 ------- 0 ------- 3 ------- 6 ------- 9 ------- 12
The shaded area would be to the right of -3, representing all values of x that make the inequality true.