document.write( "Question 175616: A club treasurer has $28.45 consisting of nickels, dimes, and quarters. She has 9 more nickels than dimes and three times as many dimes as quarters. How many does she have of each coin? \n" ); document.write( "
Algebra.Com's Answer #130701 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! treasurer has $28.45 consisting of nickels, dimes, and quarters. \n" ); document.write( " She has 9 more nickels than dimes and three times as many dimes as quarters. \n" ); document.write( " How many does she have of each coin? \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement: \n" ); document.write( ": \n" ); document.write( "\"treasurer has $28.45 consisting of nickels, dimes, and quarters.\" \n" ); document.write( ".05n + .10d + .25q = 28.45 \n" ); document.write( ": \n" ); document.write( " \"She has 9 more nickels than dimes\" \n" ); document.write( "n = d + 9 \n" ); document.write( ": \n" ); document.write( "\" and three times as many dimes as quarters.\" \n" ); document.write( "d = 3q \n" ); document.write( "or we can write it: \n" ); document.write( "q = \n" ); document.write( ": \n" ); document.write( " How many does she have of each coin? \n" ); document.write( ": \n" ); document.write( "Using the 1st equation substitute: \n" ); document.write( "(d+9) for n \n" ); document.write( " \n" ); document.write( ".05(d+9) + .10d + .25( \n" ); document.write( ".05d + .45 + .10d + \n" ); document.write( ".15d + \n" ); document.write( ".15d + \n" ); document.write( "Multiply equation by 3 to get rid of the denominator \n" ); document.write( ".45d + .25d = 84 \n" ); document.write( ".70d = 84 \n" ); document.write( "d = \n" ); document.write( "d = 120 dimes \n" ); document.write( ": \n" ); document.write( "Find nickels: \n" ); document.write( "n = 120 + 9 \n" ); document.write( "n = 129 nickels \n" ); document.write( ": \n" ); document.write( "Find quarters: \n" ); document.write( "q = \n" ); document.write( "q = 40 quarters \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "Check solutions in the 1st equation: \n" ); document.write( ".05(129) + .10(120) + .25(40) = \n" ); document.write( "6.45 + 12.00 + 10.00 = 28.45; confirms our solutions\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |