PLEASE HELP I WILL GIVE 5 STARS AND HEART I NEED HELP WITH THESE QUESTIONS!!

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

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

What dimensions can créate more than one triangle ?