document.write( "Question 588029: Heather has $2.50 in nickels, dimes and quarters. She has three times as many nickels as dimes and four times as many quarters as dimes.
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document.write( "a. Write an equation that relates the number of each kind of coin to the amount of money that Heather has.
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document.write( "b. How many of each kind of coin does heather have? \n" );
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Algebra.Com's Answer #374366 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Heather has $2.50 in nickels, dimes and quarters. \n" ); document.write( " She has three times as many nickels as dimes and four times as many quarters as dimes. \n" ); document.write( "a. Write an equation that relates the number of each kind of coin to the amount of money that Heather has. \n" ); document.write( ": \n" ); document.write( "The total value equation \n" ); document.write( ".05n + .10d + .25q = 2.50 \n" ); document.write( "\"three times as many nickels as dimes\" \n" ); document.write( "n = 3d \n" ); document.write( "\"four times as many quarters as dimes.\" \n" ); document.write( "q = 4d \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "b. How many of each kind of coin does heather have? \n" ); document.write( ": \n" ); document.write( ".05n + .10d + .25q = 2.50 \n" ); document.write( "replace n and q using the above equations \n" ); document.write( ".05(3d) + .10d + .25(4d) = 2.50 \n" ); document.write( ".15d + .10d + 1.00d = 2.50 \n" ); document.write( "1.25d = 2.50 \n" ); document.write( "d = 2.50/1.25 \n" ); document.write( "d = 2 dimes \n" ); document.write( "then \n" ); document.write( "n = 3(2) \n" ); document.write( "n = 6 nickels \n" ); document.write( "and \n" ); document.write( "q = 4(2) \n" ); document.write( "q = 8 quarters \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check these solution in the value equation \n" ); document.write( ".05(6) - .10(2) + .25(8) = \n" ); document.write( ".30 = .20 + 2.00 = 2.50 \n" ); document.write( " |