The range of a data set is 32. if the largest number in the set is 50 what is the smallest number

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 of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

What is the average rate of change for this function for the interval from x=2 to x=4 ?