Step-by-step explanation:
<, > - open circle
≤, ≥ - closed circle
<, ≤ - draw the line to the left
>, ≥ - draw the line to the right
[tex]a)\ 4x>18\qquad\text{divide both sides by 4}\\\\\dfrac{4x}{4}>\dfrac{18}{4}\\\\x>4.5\\\\b)\ x-8\geq24\qquad\text{add 8 to both sides}\\\\x-8+8\geq24+8\\\\x\geq32[/tex]
