Stephanie and Shawna are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of shiny wrapping paper. Stephanie sold 10 rolls of plain wrapping paper and 4 rolls of shiny wrapping paper for a total of $90. Shawna sold 5 rolls of plain wrapping paper and 10 rolls of shiny wrapping paper for a total of $125. What is the cost each of one roll of plain wrapping paper and one roll of shiny wrapping paper?

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?