document.write( "Question 76441This question is from textbook College Algebra
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document.write( ": sandy has a collection of 57 coins worth $10. They consist of nickels, dimes, and quarters. The number of quarters is 2 more than 3 times the number of nickels. HOw many coins of each kind does she have?\r
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document.write( "I can't figure this out. Please help
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document.write( "on page 386 \n" );
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Algebra.Com's Answer #54843 by scott8148(6628) You can put this solution on YOUR website! n+d+q=57...5n+10d+25q=1000...q=3n+2...substituting the value of q from the third equation into the first two equations gives\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A)n+d+3n+2=57...and B)5n+10d+75n+50=1000..multiplying equation A by 10 and subtracting the result from equation B gives\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "5n+10d+75n+50-10n-10d-30n-20=1000-570...rearranging and combining terms gives...40n=400 or n=10...so q=32 and d=15 \n" ); document.write( " |