A vendor is selling championship t-shirts for $33.00. After a day, sells were so good, they raised the selling price by 25%. What is the amount of percent increase on the t-shirts?

Solve the system of equations. y= 2x y= x^2 - 15

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?