document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1009462>Question 1009462</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A woman drives 10 miles then increases her speed by 10 miles per hour and drives another 25 miles. Find the original speed if she drove for 45 minutes </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #624960 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=624960\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the original speed be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%28+mil%2Fh%29 ALIGN=MIDDLE  ALT=\"s%28+mil%2Fh%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. \r<BR>\n" );
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document.write( "distance: <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=st ALIGN=MIDDLE  ALT=\"d=st\"   DISABLED_style= \"max-width:90%; height:auto;\" >=><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10mil=st ALIGN=MIDDLE  ALT=\"10mil=st\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "time: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=10%2Fs ALIGN=MIDDLE  ALT=\"t=10%2Fs\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=%28s%2B10%29t ALIGN=MIDDLE  ALT=\"d=%28s%2B10%29t\"   DISABLED_style= \"max-width:90%; height:auto;\" >=><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25mil=st ALIGN=MIDDLE  ALT=\"25mil=st\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "time: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=25%2F%28s%2B10%29 ALIGN=MIDDLE  ALT=\"t=25%2F%28s%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "if time <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=45min ALIGN=MIDDLE  ALT=\"t=45min\"   DISABLED_style= \"max-width:90%; height:auto;\" >=><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%2845%2F60%29h ALIGN=MIDDLE  ALT=\"t=%2845%2F60%29h\"   DISABLED_style= \"max-width:90%; height:auto;\" >=><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=0.75h ALIGN=MIDDLE  ALT=\"t=0.75h\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "then we have:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%2Fs+%2B+25%2F%28s%2B10%29+=+0.75 ALIGN=MIDDLE  ALT=\"10%2Fs+%2B+25%2F%28s%2B10%29+=+0.75\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%28s%2B10%29+%2Fs%28s%2B10%29++%2B+25%2F%28s%2B10%29+=+0.75 ALIGN=MIDDLE  ALT=\"10%28s%2B10%29+%2Fs%28s%2B10%29++%2B+25%2F%28s%2B10%29+=+0.75\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%2810s%2B100%29++%2B+25s%29%2Fs%28s%2B10%29+=+0.75 ALIGN=MIDDLE  ALT=\"%28%2810s%2B100%29++%2B+25s%29%2Fs%28s%2B10%29+=+0.75\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810s%2B100+%2B+25s%29=+0.75%2As%28s%2B10%29+ ALIGN=MIDDLE  ALT=\"%2810s%2B100+%2B+25s%29=+0.75%2As%28s%2B10%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100+%2B+35s=+0.75%28s%5E2%2B10s%29+ ALIGN=MIDDLE  ALT=\"100+%2B+35s=+0.75%28s%5E2%2B10s%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100+%2B+35s=+0.75s%5E2%2B7.5s+ ALIGN=MIDDLE  ALT=\"100+%2B+35s=+0.75s%5E2%2B7.5s+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=+0.75s%5E2%2B7.5s-35s-100 ALIGN=MIDDLE  ALT=\"0=+0.75s%5E2%2B7.5s-35s-100\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0.75s%5E2-27.5s-100=0 ALIGN=MIDDLE  ALT=\"+0.75s%5E2-27.5s-100=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........use quadratic formula\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"s+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%28-%28-27.5%29+%2B-+sqrt%28%28-27.5%29%5E2-4%2A0.75%2A%28-100%29+%29%29%2F%282%2A0.75%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%2827.5+%2B-+sqrt%28756.25%2B300+%29%29%2F1.5+ ALIGN=MIDDLE  ALT=\"s+=+%2827.5+%2B-+sqrt%28756.25%2B300+%29%29%2F1.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%2827.5+%2B-+sqrt%281056.25+%29%29%2F1.5+ ALIGN=MIDDLE  ALT=\"s+=+%2827.5+%2B-+sqrt%281056.25+%29%29%2F1.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%2827.5+%2B-+32.5%29%2F1.5+ ALIGN=MIDDLE  ALT=\"s+=+%2827.5+%2B-+32.5%29%2F1.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "we need only positive solution, speed cannot be negative value\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%2827.5+%2B+32.5%29%2F1.5+ ALIGN=MIDDLE  ALT=\"s+=+%2827.5+%2B+32.5%29%2F1.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+60%2F1.5+ ALIGN=MIDDLE  ALT=\"s+=+60%2F1.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28s+=+40mph%29 ALIGN=MIDDLE  ALT=\"highlight%28s+=+40mph%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-> original speed\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );