What is the product of 3/4 and 3 1/5

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left