document.write( "Question 958800: a parking meter contains nickels and quarter worth $11.40. There are 84 coins in total. Find how many of each there are \n" ); document.write( "
Algebra.Com's Answer #586014 by checkley77(12844) ![]() You can put this solution on YOUR website! N+Q=84 OR N=84-Q \n" ); document.write( ".05N+.25Q=11.40 SUBSTITUTE (84-Q) FOR N IN THIS EQUATION. \n" ); document.write( ".05(84-Q)+.25Q=11.40 \n" ); document.write( "4.20-.05Q+.25Q=11.40 \n" ); document.write( ".20Q=11.40-4.20 \n" ); document.write( ".20D=7.20 \n" ); document.write( "D=7.20/.20 \n" ); document.write( "D=36 QUARTERS. \n" ); document.write( "N+36=84 \n" ); document.write( "N=84-56 \n" ); document.write( "N=48 NICKELS. \n" ); document.write( "PROOF. \n" ); document.write( ".05*48+.25*36=11.40 \n" ); document.write( "2.40+9.00=11.40 \n" ); document.write( " |