document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=732123>Question 732123</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John and Mary leave their house at the same time and drive in opposite directions. John drives at 90 mi/h and travels 35 mi farther than Mary, who drives at 40 mi/h. Mary's trip takes 15 min longer than John's. For what length of time does each of them drive? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #447567 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=447567\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> John and Mary leave their house at the same time and drive in opposite directions. John drives at 90 mi/h and travels 35 mi farther than Mary, who drives at 40 mi/h. Mary's trip takes 15 min longer than John's. For what length of time does each of them drive?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=John's travel time<BR>\n" );
document.write( "15 min=1/4 hr<BR>\n" );
document.write( "(x+1/4)=Mary's travel time<BR>\n" );
document.write( "distance=travel time*speed<BR>\n" );
document.write( "..<BR>\n" );
document.write( "90x-40(x+1/4)=35<BR>\n" );
document.write( "90x-40x-10=35<BR>\n" );
document.write( "50x=45<BR>\n" );
document.write( "x=45/50=9/10 hr or 54 min<BR>\n" );
document.write( "x+1/4=18/20+5/20=23/20 hr or 69 min<BR>\n" );
document.write( "John's travel time=54 min<BR>\n" );
document.write( "Mary's travel time=69 min </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );