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21 December, 11:54

A piggy bank contains quarters and dollar bills. There is at least $18 in the piggy bank and at least 20 quarters. Which of the following systems correctly describe the possible number of quarters (q) and dollar bills (d) in the piggy bank?

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  1. 21 December, 15:27
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    0.25q + 1d > = 18

    q > = 20
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