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Sam has 18 coins in his pocket that are either quarters or nickels. The total value of these coins is $3.90.

Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents this situation:

q+n=18

0.25q+0.05n=3.90

How many quarters and nickels does Sam have?

  • math -

    Substitute 18-q for n in the second equation and solve for q. Insert that value into the first equation to solve for n. Check by putting both values into the second equation.

  • math -

    idk fam

  • math -

    9
    i
    9
    o0
    0
    0

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