Seudónimo Seudónimo

09-09-2016
Mathematics

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Juan has 16 coins, all nickels and dimes. This collection of coins is worth $1. 15. How many nickels and dimes are there?

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connerlinda97 connerlinda97

09-09-2016

You would have 7 dimes and 9 nickels, this is because

5n +10d = 115 n + d = 16
n = 23 - 10d n = 16 - d

23 - 10d = 16 -d
7 = 9d
7/9 = d

Therefore there is 7 dimes and 9 nickels

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