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1. The perimeter of a rectangle is 60m. The length is 9m more than twice the width. Find the dimensions

2. Soybean meal is 16% protein; cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320lb mixture that is 11% protein?

How many pounds of the cornmeal should be in the mixture?
How many pounds of the soybean should be in the mixture?

3. A student a $9.25 purchase at the bookstore with a $20 bill. The store has no bills and gives the change in quarters and fifty cent pieces. There are 30 coins in all. How many of each kind are there?

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