SOLUTION: Stefan has a collection of nickels, dimes, and quarters. In all, he has 24 coins. seven of the coins are quarters. The total value of he collection is $2.90. How many nickels ad ho
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Question 560732: Stefan has a collection of nickels, dimes, and quarters. In all, he has 24 coins. seven of the coins are quarters. The total value of he collection is $2.90. How many nickels ad how many dimes does he have
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Stefan has a collection of nickels, dimes, and quarters. In all, he has 24 coins. seven of the coins are quarters. The total value of he collection is $2.90. How many nickels ad how many dimes does he have
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Equations:
n + d + q = 24 coins
5n+10d+25q = 290 cents
q = 7
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n + d = 17
5n+10d = 115
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5n + 5d = 85
5n +10d = 115
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5d = 30
d = 6 (# of dimes)
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Solve for "n":
n + d = 16
n + 6 = 16
n = 10 (# of nickels)
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Cheers,
Stan H.
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