What is the measure of the unknown angle ?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.