SOLUTION: If Zaire has 4 times as many quarters as dimes and they have a combined value of $4.40, how many of each coin does he have?

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Question 1205418: If Zaire has 4 times as many quarters as dimes and they have a combined value of $4.40, how many of each coin does he have?
Found 4 solutions by ikleyn, MathLover1, Edwin McCravy, josgarithmetic:
Answer by ikleyn(52781) About Me  (Show Source):
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.
If Zaire has 4 times as many quarters as dimes and they have a combined value
of $4.40, how many of each coin does he have?
~~~~~~~~~~~~~~~~~~~~~~

Group the coins in sets containing 4 quarters and 1 dime.

Each group is worth 4*25 + 10 = 110 cents.


In all, there are  440%2F110 =  4 such groups.


ANSWER.  There are 4*4 = 16 quarters and 4 dimes.

Solved.

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Answer by MathLover1(20849) About Me  (Show Source):
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let quarters be q+and dimes d
if Zaire has 4 times as many quarters as dimes, we have
q+=4d....eq.1
if a combined value of $4.40,we have
0.25q%2B0.10d=4.40...eq.2, substitute q from eq.1
0.25%2A4d%2B0.10d=4.40....solve for d
1.10d=4.40
d=4.40%2F1.10
d=4
go to
q+=4d....eq.1, substitute d
q+=4%2A4
q+=16
Zaire has 16quarters and 4 dimes.

Answer by Edwin McCravy(20055) About Me  (Show Source):
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1 group of 4 quarters and 1 dime is worth $1.10.
$4.40 is 4 of those groups. 

So there are 4x4=16 quarters and 1x4=4 dimes.

Edwin


Answer by josgarithmetic(39617) About Me  (Show Source):