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Thirty coins, all dimes and nickels, are worth $2.60. How many nickels are there? Write two equations. One for the total number of coins and one for what the amount of coins are worth. d = dimes, n = nickels. 

 

I would really appreciate it if you could quickly respond as I was gone from school today and have lots of makeup work. Thanks in advance!

Guest Dec 6, 2017

Best Answer 

 #1
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Total worth = 260 = 10d + 5n

 

Total coins = d + n = 30

 

260 = 10d + (30-d)5   

        = 10d + 150 - 5 d 

110 = 5 d     d = 22  dimes     n = 30 - dimes = 8 nickels  

Guest Dec 6, 2017
edited by Guest  Dec 6, 2017
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2+0 Answers

 #1
avatar
+1
Best Answer

Total worth = 260 = 10d + 5n

 

Total coins = d + n = 30

 

260 = 10d + (30-d)5   

        = 10d + 150 - 5 d 

110 = 5 d     d = 22  dimes     n = 30 - dimes = 8 nickels  

Guest Dec 6, 2017
edited by Guest  Dec 6, 2017
 #2
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Thank you so much! I turned it in today and got a good grade, thanks!

Guest Dec 9, 2017

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