Just say something and ill give you 30 points

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]

What value of x will make the triangles similar by the sss similarity theorem?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles