Question 108600: a girl has 24 quarters and dimes. togther they had up to 3.60 how many quarters does she have? Found 2 solutions by elima, checkley71:Answer by elima(1433) (Show Source):
You can put this solution on YOUR website! a girl has 24 quarters and dimes. togther they had up to 3.60 how many quarters does she have?
q+d=24
.25q+.1d=3.60
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d=24-q
.25q+.1(24-q)=3.60
.25q+2.4-.1q=3.60
.15q=3.6-2.4
.15q=2.4
q=8
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8+d=24
d=24-8
d=16
:)
You can put this solution on YOUR website! Q+D=24 OR D=24-Q
.25Q+.10(24-Q)=3.60
.25Q+2.4-.10Q=3.60
.15Q=3.60-2.40
.15Q=1.20
Q=1.20/.15
Q=8 ANSWER FOR THE NUMBER OF QUARTERS.
24-8=16 NUMBER OF DIMES.
PROOF
.25*8+.10*16=3.60
2.00+1.60=3.60
3.60=3.60
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