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14) Alvin paddled for 4 hours with a 6-km/hr current to reach his campsite. The return trip with the same current took 10 hours. Find the speed of Alvin’s canoe in still water. .

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  1. 14) Alvin paddled for 4 hours with a 6-km/hr current to reach his campsite. The return trip with the same current took 10 hours. Find the speed of Alvin’s canoe in still water.

  2. 15) Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each should be mixed to get a 350-lb mixture that is 12% protein.

  3. 16) A collection of quarters and nickels is worth $1.25. There are 13 coins in all. How many of each are there?

  4. 17) Quick copy recently charged 6 cents a page for copying papers that can be machine-fed and 18 cents a page for copying pages that must be hand-placed on the copier. If Lea’s bill for 90 copies was $9.24, how many copies of each type were made?

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