Eliminating the parameter!

x = 2t - 3, y = 9 - 4t

3 ≤ t ≤ 5

Find csc x if sin x + cot x cos x =√3 a. 9 b. 3 c. √(3)/2 d. √(3)

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

How can you check that you have correctly converted frequencies to relative frequencies?