If i have a shirt that's 15 dollars how do i take 20% off the price

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Asandwich shop has 18 tables. each table seats up to 4 people. to find the greatest number of people that can be seated, you can solve p4 ≤ 18. which step is the best way to solve the inequality? plz asap i repeat plz

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.