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Luke has 15 coins. He only has nickles and dimes. If the total value of the coins is $1.20, How many nickles does she have? A. 5 B.6 C.8 D.9

Guest Mar 28, 2017
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Let the number of nickles=N
Then the number of dimes =15 - N, But we have:0.05N +0.10[15 - N] =1.20
0.05N+1.5-0.10N = 1.20
-0.05N =1.20 - 1.50
-0.05N =-0.30
N =0.30/0.05
N = 6 Nickles
15 - 6 = 9 Dimes

Guest Mar 28, 2017

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