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Math Help - Pre-Cal/Matrices/System of Equations

  1. #1
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    Pre-Cal/Matrices/System of Equations

    A bank teller is counting the total amount of money in a cash register at the end of the day. There is a total of $2600 in denominations of $1, $5, $10 and $20 dollar bills.

    The total number of paper bills is $235. The number of twenty dollar bills is twice the number of $1 dollar bills and the number of $5 dollar bills is ten more than the number of $1 dollar bills. What is the system of equations to repersent the situation. Then use matrices to find the number of bills for each denomination.

    I seriously dont know where to begin here.

    Thank you
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  2. #2
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    Re: Pre-Cal/Matrices/System of Equations

    I think you mean that there is a total of 235 bills
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  3. #3
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    Re: Pre-Cal/Matrices/System of Equations

    A + b + c + d = 235
    d = 2a
    a + 10 = b
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  4. #4
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    Re: Pre-Cal/Matrices/System of Equations

    a + 5b + 10c + 20d = 2600
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  5. #5
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    Re: Pre-Cal/Matrices/System of Equations

    What does the b stand for in a+10=b? and how would I create a matrix out of this equation?
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