Find a sum equivalent to the product of 5(x+z)

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

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

What is the lcm of 16 and 40 ? 24 and 40 ?