Martin buys a pencil and a notebook for 80 cents. At the same store, Gloria buys a notebook and an eraser for 85 cents, and Zachary buys a pencil and an eraser for 45 cents. How many cents would it cost to buy three pencils, three notebooks, and three erasers? (Assume that there is no volume discount.) Pick one
A) 300 B) 315 C) 330 D) 345 E) 360
pencil + notebook = 80   notebook + eraser = 85   pencil + eraser = 45   Let's add all three equations.   2 pencils + 2 notebooks + 2 erasers = 210 cents   The cost to buy 3 of each would be (3/2)(210) = 315   The answer is 315.
<result>B</result>
Martin buys a pencil and a notebook for 80 cents. At the same store, Gloria buys a notebook and an eraser for 85 cents, and Zachary buys a pencil and an eraser for 45 cents. How many cents would it cost to buy three pencils, three notebooks, and three erasers? (Assume that there is no volume discount.)