How do you solve this?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

Interpret the following expression (5y^2-7)^3/(2y)^2