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PLEASE HELP!!! ALGEBRA

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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 represent the situation. Then use matrices to find the number of bills for each denomination.

  • PLEASE HELP!!! ALGEBRA -

    Did you mean
    " the total number of paper bills is 235" , not $235 ?

    let the number of $1 bills be x
    number of $20 bills = 2x
    number of $5 bills = x+10
    number of $10 bills = y

    x + 2x + x+10 + y = 235
    4x + y = 225 (#1)

    1(x) + 20(2x) + 5(x+10) + 10y = 2600
    x + 40x + 5x + 50 + 10y = 2600
    46x + 10y = 2550
    23x + 5y = 1275 (#2)

    Using matrices ???? , why?

    from #1, y = 225-4x

    sub into 2nd
    23x + 5(225-x) = 1275
    23x + 1125 - 5x = 1275
    18x = 150
    x = 150/18 ---> not a whole number,

    something wrong with your question, check your typing

  • PLEASE HELP!!! ALGEBRA -

    That is a Algebra Question. EVERYBODY has a problem with this question. Anyway this is a problem I tell everybody, I'm sorry I can not answer

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