Prove that parallelogram on the equal base and between the same parallel lines are equal in area.

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c

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

Can someone me with this problem . show your work .