document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=62724>Question 62724</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321233832/algebrahomeworkh>Elementary and intermediate algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> please help me<BR>\n" );
document.write( "on a sales trip gail drives 6oo miles to richmond averaging one speed.  the return trip home i made at the same average speed ten mph slower.  total time for the round trip is 22 hours.  find gails average speed for each part of the trip. this is what i've done:\r<BR>\n" );
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document.write( "s=600/(t1) and s-10=600/(t2)<BR>\n" );
document.write( "(600/t1)-10=600/(t2)<BR>\n" );
document.write( "(600/t2)-(10*t2)=(600*t1)<BR>\n" );
document.write( "(600/t2)-(600*t1)-(10*t2)=0<BR>\n" );
document.write( "(590*t2)-(600*t1)=0\r<BR>\n" );
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document.write( "where do i go from here or am i doing this right at all\r<BR>\n" );
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document.write( "thank you for your help\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #43529 by </B><A HREF=/tutors/aboutme.mpl?userid=303795><B>303795(602)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=303795><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=43529\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28600%2Ft1%29-10=600%2F%28t2%29 ALIGN=MIDDLE  ALT=\"%28600%2Ft1%29-10=600%2F%28t2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Correct but things go pear shaped in the next line<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28600%2Ft2%29-%2810%2At2%29=%28600%2At1%29 ALIGN=MIDDLE  ALT=\"%28600%2Ft2%29-%2810%2At2%29=%28600%2At1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Should be multiply both sides by t2 to get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28600t2%2Ft1%29-%2810%2At2%29=%28600%29 ALIGN=MIDDLE  ALT=\"%28600t2%2Ft1%29-%2810%2At2%29=%28600%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by t1 to get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28600t2%29-%2810%2At1t2%29=%28600t1%29 ALIGN=MIDDLE  ALT=\"%28600t2%29-%2810%2At1t2%29=%28600t1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Don't forget that t1 + t2=22 hours so t2=22-t1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600%2822-t1%29-10%2At1%2822-t1%29=%28600t1%29 ALIGN=MIDDLE  ALT=\"600%2822-t1%29-10%2At1%2822-t1%29=%28600t1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13200-600t1-220t1%2B10t1%5E2=600t1 ALIGN=MIDDLE  ALT=\"13200-600t1-220t1%2B10t1%5E2=600t1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10t1%5E2-820t1+%2B13200=600t1 ALIGN=MIDDLE  ALT=\"10t1%5E2-820t1+%2B13200=600t1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10t1%5E2-1420t1+%2B13200=0 ALIGN=MIDDLE  ALT=\"10t1%5E2-1420t1+%2B13200=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t1%5E2-142t1+%2B1320=0 ALIGN=MIDDLE  ALT=\"t1%5E2-142t1+%2B1320=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28t1-10%29%28t1-132%29=0 ALIGN=MIDDLE  ALT=\"%28t1-10%29%28t1-132%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "ie t1=10 hours or t1 = 132 hours<BR>\n" );
document.write( "The second answer is not practical (return trip in -110 hours) so the first part of the trip took 10 hours(at an average speed of 60 mph) and the second part 12 hours(at an average speed of 50 mph).<BR>\n" );
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