document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=178427>Question 178427</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am in over my head here, so please use very simple explanations.  Find b and c so that the parabola y=20x^2+bx+c has vertex (10,-3) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #133395 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=133395\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the vertex is on the axis of symmetry\r<BR>\n" );
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document.write( "the general equation for the axis of symmetry is x = -b/(2a)\r<BR>\n" );
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document.write( "in this case, 10=-b/(2*20)\r<BR>\n" );
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document.write( "multiplying by 40 __ 400=-b  __  -400=b\r<BR>\n" );
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document.write( "the value of c can be found by substituting the vertex coordinates\r<BR>\n" );
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document.write( "-3=20(10^2)-400(10)+c  __  -3=2000-4000+c\r<BR>\n" );
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document.write( "adding 2000 __  1997=c </SPAN>\n" );
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