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OpenStudy (anonymous):
Your piggy bank has a total of 47 coins in it; some are dimes and some are nickels. If you have a total of $3.95, how many nickels do you have?
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OpenStudy (anonymous):
there are many answers...
OpenStudy (anonymous):
Wait...no
OpenStudy (amistre64):
n = (3.95 - 47(10))/(5-10) perhaps
OpenStudy (anonymous):
Hold on, brb
OpenStudy (amistre64):
that almost works :)
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OpenStudy (amistre64):
.10 and .05
OpenStudy (amistre64):
n = (3.95 - 47(.10))/(.05-.10) is better
OpenStudy (amistre64):
15 is good
OpenStudy (anonymous):
make 2 equations n+d=47 and 0.05n+0.10d=3.95
OpenStudy (anonymous):
It's 32 dimes and 15 nickels, my bad
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