What is the domain of the given function?

{(3, –2), (6, 1), (–1, 4), (5, 9), (–4, 0)}

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

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

X+y=-4 x-y=2 use elimination with adding and subtraction