Arjun ordered 6 slices of pizza. He paid with a 20 dollar bill. How much change did he get back?

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

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

A. what is the area of the base? use complete sentences to explain your reasoning. b. what is the volume of the prism? use complete sentences to explain your reasoning.