Please help ! anyone know the answer :(

Answer:
[tex]\mathrm{C}[/tex]
Step-by-step explanation:
[tex]3-\frac{x}{2}\ge 15[/tex]
[tex]3-\frac{x}{2}-3\ge \:15-3[/tex]
[tex]-\frac{x}{2}\ge \:12[/tex]
[tex]-\frac{x}{2} \times 2 \ge \:12 \times 2[/tex]
[tex]-x\ge \:24[/tex]
[tex]x\le -24[/tex]