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Doss [256]
3 years ago
7

a piggy bank contains 100 coins consisting of nickels and dimes. the total value of the coins is $8.50. How many coins of each t

ype does the bank contain?
Mathematics
2 answers:
VikaD [51]3 years ago
8 0
30 Nickels, 70 Dimes

1 nickel (n) =5 cents
1 dime (d) =10 cents
total value 850 cents
5n+10d=850        divide both sides by 5

n+2d=170     solving with the system of equations we get

n+2d=170
n+d=100

N=30
D=70



stealth61 [152]3 years ago
6 0

the bank contains 30 nickels and 70 dimes.


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The circumference of a circle is 22 cm.
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Crazy boy [7]
You will need three roots for this, so we have
Let x = -30, -10 and +20
So the factors will be (x+30)(x+10)(x-20)
The divide it to 100, this will help bring the peak up and down
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