math

posted by j

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?

  1. PsyDAG

    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.

  2. Anonymous

    idk fam

  3. Anonymous

    9
    i
    9
    o0
    0
    0

  4. Anonymous

    what is ittttt I have to do my tenmarksssss

  5. Anonymous

    I too have to do my tenmarks

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