close
    a coin bank contains twenty six nickels and quarters. the coins have a total value of $3.50. find the number of nickels and the number of quarters in the bank.

    0  Views: 617 Answers: 2 Posted: 12 years ago

    2 Answers

    n = nickels


    q = quarters


    n + q = 26


    q = 26 - n


    5n + 25q = 350   >  substitute first equation into this equation 


    _________________________________________


    5n + 25(26 - n) = 350


    5n + 650 - 25n = 350


    -20n + 650 = 350


             -650     -650   


    ________________________


    -20n  =  -300  


    _____     ______


     -20        -20


    n = 15


    Now solve for q. Use either equation.


    q = 26 - n


    q = 26 - 15


    q = 11

    In order to figure out the number of each coin, one need to define on of them as y (for instance) and the other as 26-y.
    The initial equation is: 26 x [ 0.05y + 0.25 x (26 - y) ] = 3.5.



    Top contributors in Uncategorized category

     
    ROMOS
    Answers: 18061 / Questions: 154
    Karma: 1102K
     
    Colleen
    Answers: 47269 / Questions: 115
    Karma: 953K
     
    country bumpkin
    Answers: 11322 / Questions: 160
    Karma: 838K
     
    Benthere
    Answers: 2392 / Questions: 30
    Karma: 760K
    > Top contributors chart

    Unanswered Questions

    confidealio1
    Answers: 0 Views: 7 Rating: 0
    789pso
    Answers: 0 Views: 8 Rating: 0
    8kbetfart
    Answers: 0 Views: 8 Rating: 0
    gk88vnvip
    Answers: 0 Views: 9 Rating: 0
    tip88im
    Answers: 0 Views: 13 Rating: 0
    69VN | TRANG CHU 69VN | DANG KY TANG NGAY 169K
    Answers: 0 Views: 7 Rating: 0
    QQ88 Vulcand
    Answers: 0 Views: 7 Rating: 0
    avcilarescortmanken
    Answers: 0 Views: 9 Rating: 0
    > More questions...
    483679
    questions
    724152
    answers
    813015
    users