document.write( "Question 1127429: An old jar of dimes and quarters contains 200 coins total, and the value of all the coins is $24.50. How many quarters are in the jar? \r
\n" ); document.write( "\n" ); document.write( "A. 50
\n" ); document.write( "B. 130
\n" ); document.write( "C. 127
\n" ); document.write( "D. 150
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Algebra.Com's Answer #743830 by addingup(3677)\"\" \"About 
You can put this solution on YOUR website!
d + q = 200 therefore d = 200-q
\n" ); document.write( "0.10d + 0.25q = 24.50 substitute for d:
\n" ); document.write( "0.10(200-q) + 0.25q = 24.50
\n" ); document.write( "20 - 0.10q + 0.25q = 24.50
\n" ); document.write( "0.15q = 4.50
\n" ); document.write( "q = 30 there are 30 quarters in the jar
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