A store has a 20% off sale on pants. With this discount, the price of one pair pants before tax is $15.20. What was the original price of the pants?

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano