Lauren went shopping for a new pair of pants because of a sale. The price on the tag was $20, but Lauren paid $13 before tax. Find the percent discount.

Taking algebra two apex courses and need with these questions

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

What is the solution set of the quadratic inequality x^2-5< or equal to 0