SOLUTION: U.S. five cent coins are made from a combination of nickel and copper. For every 1 lb of nickel, 3 lb of copper are used. How many pounds of cooper would be needed to make 560 lb

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Question 1107786: U.S. five cent coins are made from a combination of nickel and copper. For every 1 lb of nickel, 3 lb of copper are used. How many pounds of cooper would be needed to make 560 lb of five cent coins?
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
c = 3n
n + c = 560
n + 3n = 560
4n = 560
n = 140
He will need 140 Lbs of nickel and 140(3) = 420 Lbs of copper