What is 3 groups of w in algebraic expression

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]

Can someone me with this problem . show your work .

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base