A painting class has 50 class members the rules state that 60% of students must be present to hold the class how many students must be there

In what form is the following linear equation written y=9x+2

A50% increase followed by 33 1/2% decrease

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?