Joshua bought Vans for $69.76 including tax. The Vans had a sticker price of $64. What percent sales tax did he pay?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°

Can someone me out here and the tell me the greatest common factor