document.write( "Question 277144: A coin bank contains $17.00 in pennies and nickels. If there are 1140 coins in the bank how many of the coins are nickels? \n" ); document.write( "
Algebra.Com's Answer #201812 by CharlesG2(834) ![]() You can put this solution on YOUR website! A coin bank contains $17.00 in pennies and nickels. If there are 1140 coins in the bank how many of the coins are nickels?\r \n" ); document.write( "\n" ); document.write( "P pennies, N nickels\r \n" ); document.write( "\n" ); document.write( "P + N = 1140\r \n" ); document.write( "\n" ); document.write( "0.01P + 0.05N = 17 --> P + 5N = 1700 (multiplied both sides by 100) \n" ); document.write( "P = 1700 - 5N\r \n" ); document.write( "\n" ); document.write( "1700 - 5N + N = 1140 \n" ); document.write( "1700 - 4N = 1140 \n" ); document.write( "560 = 4N \n" ); document.write( "140 nickels = N\r \n" ); document.write( "\n" ); document.write( "1140 - 140 = 1000 = P\r \n" ); document.write( "\n" ); document.write( "0.01 * 1000 = 10 \n" ); document.write( "0.05 * 140 = 7 \n" ); document.write( "10 + 7 = 17 \n" ); document.write( " \n" ); document.write( " |