If $x + 2y= 4$ and $xy = -8$, what is the value of $x^2 + 4y^2$?

If 1/2+2/5s=s-3/4,what is the value of s? a. s=3/4 b. s=25/12 c. s=-25/12 d. s=-3/4

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal