document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=596589>Question 596589</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sue drove her car at 25 mph for the first part of a trip and then changed her speed to 55 mph for the second part. If the entire trip is 295 miles and took 7 hours, how many hours are traveled at each speed?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #377821 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=377821\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sue drove her car at 25 mph for the first part of a trip and then changed her speed to 55 mph for the second part. If the entire trip is 295 miles and took 7 hours, how many hours are traveled at each speed?<BR>\n" );
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document.write( "let x=distance traveled for first part of trip at 25 mph<BR>\n" );
document.write( "let (295-x)=distance traveled for second part of trip at 55 mph<BR>\n" );
document.write( "travel time=distance/speed<BR>\n" );
document.write( "x/25+(295-x)/55=7<BR>\n" );
document.write( "LCD:25*55=1375<BR>\n" );
document.write( "55x+25*295-25x=1375*7=9625<BR>\n" );
document.write( "30x+7375=9625<BR>\n" );
document.write( "30x=2250<BR>\n" );
document.write( "x=75<BR>\n" );
document.write( "travel time for first part of trip=x/25=75/25=3 hrs<BR>\n" );
document.write( "travel time for second part of trip=7-3=4 hrs </SPAN>\n" );
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