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10 January, 15:39

Maribel goes to a coin star to turn in her change. The coins are quarters and dimes. The machine gives her 14.80 credit for 76 coins. How many quarters and dimes does she have?

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  1. 10 January, 17:16
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    10*d+25*q=1480, where d is the number of dimes and q is the number of quarters. If she has 76 coins total, then: 76=q+d Solving for d yields d=76-q, which we substitute into the first equation: 10 * (76-q) + 25*q=1480 Simplifying and solving for q: 760-10*q+25*q=1480 15*q=720 q=48 Substituting back into the second equation: d=76-48=28 Check solution: 10*28+25*48=1480 Maribel had 28 dimes and 48 quarters.
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