mhutchens13p91wrf mhutchens13p91wrf
  • 21-05-2018
  • Mathematics
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amanda has a total of 80 nickels and quarters. The total value of the change is $7.60. How many nickels does she have?

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MrGumby
MrGumby MrGumby
  • 01-06-2018
She has 62 nickels and 18 quarters. 

You can find this by setting up the following system of equations:

x + y = 80 (total number of coins)
5x + 25y = 760 (total number of cents)

Then you can mutliply the first equation by -5 to get the x values to cancel out. You can then solve this for y. 
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