document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=458988>Question 458988</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Danville Express travels 280 mi. at a certain speed. If the speed had been increased by 5 mph, the trip could have been made in 1 hour less time. Find the actual speed.    I cannot figure the formula to use to figure this problem. Can you please help me?<BR>\n" );
document.write( "      Michele </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315067 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=315067\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 280/x=280/(x+5)+1<BR>\n" );
document.write( "280(x+5)=280x+(x)(x+5)<BR>\n" );
document.write( "280x+1400=280x+x2+5x<BR>\n" );
document.write( "x2+5x-1400=0<BR>\n" );
document.write( "(x+40)(x-35)=0<BR>\n" );
document.write( "x=35 or -40<BR>\n" );
document.write( "Throwing out the negative answer, we get the speed of the Danville Express to be 35 mph<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "280/35= 8 hours<BR>\n" );
document.write( "280/40= 7 hours.. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );