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21 July, 08:33

You have a total of 21 coins that are nickels and quarters. The coins have a value of $2.25. How many quarters do you have?

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  1. 21 July, 11:38
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    Answer: 6

    Step-by-step explanation:

    Let n represent the quantity of nickels and q represent the quantity of quarters, then set up a system of equations and solve for q.

    Quantity: n + q = 21 → - 5 (n + q = 21) → - 5n - 5q = - 105

    Value: 5n + 25q = 225 → 1 (5n + 25q = 225) → 5n + 25q = 225

    20q = 120

    q = 6
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