If 2/3 of the students in the cafeteria are in sixth grade then how many sixth graders are there if there are 27 students in the cafeteria?

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]

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which of the following best describes the delian problem?