LeAnn has 20 coins in her piggy bank. All the coins are either pennies or dimes. The total value of the coins is 83¢. How many pennies are there? How many dimes?
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OpenStudy (anonymous):
@primeralph
OpenStudy (primeralph):
I don't even know what a dime and penny hold in terms of monetary value.
I usually throw them away.
OpenStudy (anonymous):
-_-
OpenStudy (primeralph):
@e.cociuba
OpenStudy (anonymous):
dimes= 10 cent pennies=1 cent
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OpenStudy (primeralph):
@amistre64 @satellite73 Anybody know what a penny is?
OpenStudy (anonymous):
1 cent!
OpenStudy (amistre64):
i have tons of them in the floorboard of my car :)
OpenStudy (anonymous):
Can someone help me ? -____-
OpenStudy (amistre64):
p+d = 20
1p + 10d = 83
solve the system
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OpenStudy (primeralph):
A penny is 1 cent? What's that good for?
OpenStudy (anonymous):
@arilove1d
OpenStudy (amistre64):
i jsut gave you the equations you need to relate :/
OpenStudy (anonymous):
OMG i just did this
OpenStudy (anonymous):
o.o
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OpenStudy (amistre64):
p+d = 20
1p + 10d = 83
solve the system
OpenStudy (anonymous):
Well sorry , you DONT Have to help me anymore then , since you wanna catch an attitude.
OpenStudy (amistre64):
let p=10+n
let d=10-n
OpenStudy (anonymous):
10 dimes and 3 pennies ? .-.
OpenStudy (anonymous):
whoa i was just saying i just learned it
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OpenStudy (amistre64):
(10+n)+(10-n) = 20 ; this is true for any value of n
(10+n) + 10(10-n) = 83 ; find n
OpenStudy (anonymous):
Oh... sorry..
OpenStudy (amistre64):
10+3 does not equal 20 coins
OpenStudy (anonymous):
its ok i should have rephrased that
OpenStudy (anonymous):
I know , I mean 8 dimes and 3 pennies because 8 dimes is 80 cent + 3 pennies = 83 cent :D
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OpenStudy (amistre64):
there are many combinations that work for one but not the other .... guessing could take all day
(10+n) + 10(10-n) = 83 ; find n
OpenStudy (anonymous):
Hmmm... 10 ?
OpenStudy (amistre64):
good luck ...
OpenStudy (anonymous):
-_-
OpenStudy (anonymous):
p+d = 20
1p + 10d = 83
subtract 1st equation from second:
p-p + 10d-d = 83-20
9d = 63
d = 7
p = 20-d = 13
LeAnn has 7 dimes and 13 pennies
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OpenStudy (primeralph):
I don't care, this person is broke. Really.
OpenStudy (anonymous):
Oh im late .......
OpenStudy (anonymous):
Lol , who ?
OpenStudy (primeralph):
LeAnn.
OpenStudy (anonymous):
BOL!
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OpenStudy (anonymous):
.-.
OpenStudy (anonymous):
I didnt even see that what ari put... THANK YOU ARIII! :)