James made 15 out of 25 free throws. later, he made 21 out of 25 free throws. what is the percent increase?

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]

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

Solve x+3y=6 and 4x-6y=6 by elimination . show work !