Last year, springfield middle school had 640 students. this year it has 460 students. what is the percent decrease?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Which of the following circles have their centers in the third quadrant?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?