anonymous
  • anonymous
A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there? a)10 b)8 c)9
Mathematics
chestercat
  • chestercat
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OakTree
  • OakTree
This is a problem of guess and check; there's no easier way to do it.
OakTree
  • OakTree
But in this case you must have an odd number of nickels to make the 5 cents, so your answer is 9 nickels.
anonymous
  • anonymous
you can check this by multiplying each one by .05: 9*.05=.45 the rest of the coins left, are 8 of them, and their dimes. .10*8=.80 .80+.45= 1.25

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anonymous
  • anonymous
so C) is the correct response

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