Recycled CD, incorporated, offers a choice of 5 used CDs for $21, with each additional CD costing $5. Write a cost function for purchasing 5 or more CDs. What will the cost of buying 6 CDs be? Let x represent the number of CDs over 5.

Find the missing dimension extra points

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?

What is the radius of the cone in the diagram? round your answer to the nearest whole number