document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=920429>Question 920429</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this problem?\r<BR>\n" );
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document.write( "\"Bob cycles along a road <BR>\n" );
document.write( "He cycles 60km at an average speed of  xkm/h<BR>\n" );
document.write( "He then cycles a further 45km at an average speed of (x+4)km/h<BR>\n" );
document.write( "His total cycling time was 6h\"\r<BR>\n" );
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document.write( "\"Form an expression in terms of x and show that it simplifies to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2-27x-80 ALIGN=MIDDLE  ALT=\"2x%5E2-27x-80\"   DISABLED_style= \"max-width:90%; height:auto;\" >\"<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558352 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558352\">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=60km%2Fx+%2B+45km%2F%28x%2B4%29+=+6hr ALIGN=MIDDLE  ALT=\"60km%2Fx+%2B+45km%2F%28x%2B4%29+=+6hr\"   DISABLED_style= \"max-width:90%; height:auto;\" > |Multiplying thru by x(x+4) so as all denominators = 1<BR>\n" );
document.write( "60(x+4) + 45x = 6x(x+4)<BR>\n" );
document.write( "60x + 240 + 45x = 6x^2 + 24x<BR>\n" );
document.write( "6x^2  - 81x - 240 = 0<BR>\n" );
document.write( "2x^2 + 27 - 80 = 0<BR>\n" );
document.write( ".......<BR>\n" );
document.write( "..........<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-27+%2B-+sqrt%28+1369%29%29%2F%284%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-27+%2B-+sqrt%28+1369%29%29%2F%284%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-27+%2B-+37%29%2F%284%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-27+%2B-+37%29%2F%284%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = -16, x = 10/4 = 5/2 = 2.5<BR>\n" );
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