document.write( "Question 1073712: when the children in a school were arranged for a mass drill in equal rows . there were 5 rows more than the children in each row. if the roll call that day was 750. find the number of rows formed. \n" ); document.write( "
Algebra.Com's Answer #688499 by KMST(5328)\"\" \"About 
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THE FIFTH GRADE FACTORER says
\n" ); document.write( "\"750=75%2A10=25%2A3%2A10=25%2A30\" .
\n" ); document.write( "There were \"25\" children in each of \"highlight%2830%29\" rows.
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\n" ); document.write( "THE ALGEBRA STUDENT says
\n" ); document.write( "Let \"x\" be the number of children in each row.
\n" ); document.write( "Then, \"x%2B5\" is the number of rows, and
\n" ); document.write( "\"x%28x%2B5%29=750\" is the number of children in school that day.
\n" ); document.write( "\"x%5E2%2B5x=750\"
\n" ); document.write( "\"x%5E2%2B5x-750=0\"
\n" ); document.write( "Using the quadratic formula to solve that quadratic equation,
\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+5%5E2-4%2A1%2A%28-750%29+%29%29%2F%282%2A1%29+\"
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\n" ); document.write( "The two solutions to that equation are
\n" ); document.write( "\"x=%28-5%2B55%29%2F2=50%2F2=25\" and
\n" ); document.write( "\"x=%28-5-55%29%2F2=%28-60%29%2F2=-30\" .
\n" ); document.write( "Since the number of children in each row cannot be a negative number.
\n" ); document.write( "\"x=-30\" is not a solution of the problem, so \"x=25\" ,
\n" ); document.write( "and the number of rows is \"x%2B5=25%2B5=highlight%2830%29\" .
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