On the first math test keiko answered

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]

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

You draw a card at random from a deck that contains 33 black cards and 77 red cards.