Can someone me for question 9, 10, 11, 12, and 13?

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Which statement best explains why ben uses the width hi to create the arc at j from point k

Indicate the formula for the following conditions: p^c(n, r)=