Write 1/4 and 2/3 as fractions with a denominator of 12

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]

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17