Please help starting at 5a toward 11

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

The equation respenting the left table is