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
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
