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Math Help - System of Equations/ Matrix help??

  1. #1
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    System of Equations/ Matrix help??

    I need help find the three equations out of this:

    Code:
    A piggy bank contains 50 coins, all of them nickels, dimes, or quarters. The total value of coins is $5.60 and the value of the dimes is five times the value of the nickels. How many of each type are there?
    I should be able to use system of equations or matrices to do this, but I'm not able to pull out the equations. Any help?
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  2. #2
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    Re: System of Equations/ Matrix help??

    A piggy bank contains 50 coins, all of them nickels, dimes, or quarters.
    n + d + q = 50

    The total value of coins is $5.60
    5n + 10d + 25q = 560

    the value of the dimes is five times the value of the nickels
    10d = 5(5n)
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  3. #3
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    Re: System of Equations/ Matrix help??

    Thank you very much. Got it now!

    q=10,d=30,n=12
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