document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=956118>Question 956118</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Okay, I'm sorry but I really don't understand what you did there. To specify a bit more.\r<BR>\n" );
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document.write( "The dimensions of the facade of the house, should be 7m wide and 4 ms high, it should be a parabola, use the origin of the parabola as one corner. Find the quadratic equation to that. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #584112 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=584112\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The dimensions of the facade of the house, should be 7m wide and 4 ms high, it should be a parabola, use the origin of the parabola as one corner. Find the quadratic equation to that.<BR>\n" );
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document.write( "3 points are (0,0), (3.5,4) and (7,0)<BR>\n" );
document.write( "y = ax^2 + bx + c<BR>\n" );
document.write( "At x = 0, y = 0 --> c = 0<BR>\n" );
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document.write( "At x = 7, y = 0<BR>\n" );
document.write( "49a + 7b = 0<BR>\n" );
document.write( "7a + b = 0<BR>\n" );
document.write( "b = -7a<BR>\n" );
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document.write( "At x = 3.5, y = 4<BR>\n" );
document.write( "12.25a + 3.5b = 4<BR>\n" );
document.write( "Sub for b<BR>\n" );
document.write( "12.25a - 24.5a = 4<BR>\n" );
document.write( "-12.25a = 4<BR>\n" );
document.write( "a = -16/49<BR>\n" );
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document.write( "b = 16/7<BR>\n" );
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document.write( "--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-16x%5E2%2F49+%2B+16x%2F7 ALIGN=MIDDLE  ALT=\"y+=+-16x%5E2%2F49+%2B+16x%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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