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Terry has a collection of 50 coins.  There are only quaraters and dimes in the collection.  The total value of hte coins is $8.00.  How many dimes does he have?

 Jul 11, 2020
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d =  #dimes                     value = 10d

q = quarters = (50-d)       value = 25(50-d)            summed  = 800

 

10d    +   25(50-d)    = 800           solve for 'd' the number of dimes      then # quarters = 50 - d

 Jul 11, 2020

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