I need help with this qusetion

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 and do the problem plz so i can understand it more better

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?