81/40 write each fraction or mixed number as a decimal.

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]

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

How many square centimeters of wrapping paper will be used to wrap the shoe box?