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Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

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]

With: label the vertices and all the elements needed. find x