Question 122568
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If the number of dimes is one-fifth the number of quarters, then the number of quarters is 5 times the number of dimes.


Let x= number of dimes @ 10 cents
5x= number of quarters @ 25 cents


10(x) +25(5x) = 3105 cents

10x +125x = 3105

135x=3105
x=23 dimes
5x = 115 quarters


It checks since 
23 dimes =  $2.30
115 quar = $28.75
TOTAL  =   $31.05


R^2