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25-12-2020
Mathematics

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Marie has 11 coins, all of which are quarters and nickels. In all, they're worth $1.15. How many of each kind of coin does Marie have?

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25-12-2020

Answer:

Step-by-step explanation:

x + y = 11

.25x + .05y = 1.15

25x + 5y = 115

-25x - 25y = -275

-20y = -160

y = 8 nickels

x + 8= 11

x = 3 quarters

3 quarters and 8 nickels

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