After a discount, the price of a t-shirt is $12. The original price of the shirt was $20. What was the percent discount?​

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?