the sale sign in front of a DVD store says "buy one get one 1/2 off" If the customer buys two dvds and one dvd costs nine dollars, what is the true percent discount

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

Write 17/20 as a decimal and as a percent.