Maggie is making a necklace using a 13-inch string and identical beads. Maggie placed 12 beads next to each other starting at the left end and of the string as shown in figure. The 13 beads fill 3 inches of the string. How many total beads will completely fill the 13-inch string

Barrett is comparing the membership fees for two museums.the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?