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Algebra

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In Vanessa's coin bank there are 4 times as many quarters as nickels, 2 fewer dimes than nickels, and 15 pennies. The total amount in the bank is $5.80. How many of each coin are in the bank?

A. Assign a variable to the unknown quantity.
B. Write an equation you can use to find the unknown quantity.
C. Solve and check the equation you wrote. Show your work.

  • Algebra - ,

    nickels --- x
    quarters -- 4x
    dimes ----- x-2

    5x + 25(4x) + 10(x-2) + 15 = 580

    solve for x, then sub back into my definitions

  • Algebra - ,

    Using that equation it comes up to $5.70 not $5.80..?

  • Algebra - ,

    In that case your question is flawed.
    since x must come out to a whole number ....

    5x + 25(4x) + 10(x-2) + 15 = 580
    5x + 100x + 10x - 20 + 15 = 580
    115x = 585
    x = 5.08...

    so there is no solution.

    Check your typing

  • Algebra - ,

    Thanks. Typing is correct .. Question is flawed. Will let teacher know. Appreciate your help!

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