Do anybody know how to do this if so can you me

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]

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2