Ms crandall spent $42 on window shades that were on sale for a certain percent discount. the original price of the shades was $70. what was the percent of discount?

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Describe the relationship between the angles of similar triangles and the sides of similar triangles

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).