document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=119772>Question 119772</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321158911/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> an athlete runs at 9mph and then at 12 mph, covering 10 miles in 1 hour. how long did the athlete run at each speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #87765 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=87765\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9*X+12(1-X)=10<BR>\n" );
document.write( "9X+12-12X=10<BR>\n" );
document.write( "-3X=10-12<BR>\n" );
document.write( "-3X=-2<BR>\n" );
document.write( "X=-2/-3<BR>\n" );
document.write( "X=2/3 OR 40 MINUTES FOR THE 9 MPH SEGMENT.<BR>\n" );
document.write( "1-2/3=1/3 OR 20 MINUTES FOR THE 12 MPH SEGMENT.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "9*2/3+12*1/3=10<BR>\n" );
document.write( "6+4=10<BR>\n" );
document.write( "10=10\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );