document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=722099>Question 722099</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a bus leaves chicago every friday at 5:oopm for a 264  mi trip to another city.this week the bus leaves at 5:30 pm.To arrive in the same city on time,the driver drives 4 miles per hour faster than usual.what is the usual bus's speed </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442627 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442627\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let the speed of bus be x<BR>\n" );
document.write( "time taken to reach the city = 264/x\r<BR>\n" );
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document.write( "speed increased by 4\r<BR>\n" );
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document.write( "speed = x+4\r<BR>\n" );
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document.write( "Time taken to reach city now = 264/(x+4)<BR>\n" );
document.write( "After increase in speed it takes 1/2 hour less\r<BR>\n" );
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document.write( "It reaches same time\r<BR>\n" );
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document.write( "264/x - 264/(x+4) = 1/2\r<BR>\n" );
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document.write( "multiply by 2x(x+4)\r<BR>\n" );
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document.write( "264*2(x+4)-2*264x=x(x+4)\r<BR>\n" );
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document.write( "528x+2112-528x=x^2+4x\r<BR>\n" );
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document.write( "x^2+4x-2112=0\r<BR>\n" );
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document.write( "x^2+4x+4 = 2112+4\r<BR>\n" );
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document.write( "(x+2)^2= 2116\r<BR>\n" );
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document.write( "take square root\r<BR>\n" );
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document.write( "x+2 = +/- 46\r<BR>\n" );
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document.write( "x= 44 OR -48\r<BR>\n" );
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document.write( "ignore negative\r<BR>\n" );
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document.write( " </SPAN>\n" );
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