What is the constant of the proportionality?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2