document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193747>Question 193747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> erin drove home at an average speed of 45 mph. she returned home in the evening along the same route and average 30 mph. if erin spent a total of 1 hour commuting to and from work, how many miles did erin drive to work in the morning? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145443 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=145443\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> erin drove home at an average speed of 45 mph. <BR>\n" );
document.write( "DATA:<BR>\n" );
document.write( "rate = 45 mph ; distance = x miles ; time = x/45 hrs<BR>\n" );
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document.write( "she returned home in the evening along the same route and average 30 mph. <BR>\n" );
document.write( "DATA:<BR>\n" );
document.write( "rate = 30 mph ; distance = x miles ; time = x/30 hrs<BR>\n" );
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document.write( "if erin spent a total of 1 hour commuting to and from work, how many miles did erin drive to work in the morning?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "time to + time from = 1 hr<BR>\n" );
document.write( "x/45 + x/30 = 1<BR>\n" );
document.write( "(30x + 45x) = 30*45<BR>\n" );
document.write( "75x = 1350<BR>\n" );
document.write( "x = 18 miles (distance to work in the morning)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );