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18 August, 04:09

You have a total of 21 coins, all nickles and dimes. The total value is $1.70 Which of the following is the system of linear equations that represent this scenario? Let n = the number of nickles and let d = the number of dimes.

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  1. 18 August, 04:26
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    You need one equation for the physical nickels and dimes, which total to 21:

    n+d=21

    Secondly, you need one equation for the numerical value of those nickels and dimes. We know nickels are worth $0.05 and dime are worth $0.10:

    .05n+.1d=1.70
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