document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=762753>Question 762753</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me solve this equation? Thank You!!!!\r<BR>\n" );
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document.write( "Find the maximum Y-value on the graph of Y=f(x)<BR>\n" );
document.write( "F(x)=-x^2+10x+9<BR>\n" );
document.write( "The maximum Y-value is Y=____<BR>\n" );
document.write( " It does not show a graph on the equation so I have no idea what to do with this equation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #464168 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=464168\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the formula x = -b/(2a) to find the x coordinate of the vertex\r<BR>\n" );
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document.write( "x = -b/(2a)\r<BR>\n" );
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document.write( "x = -10/(2*(-1))\r<BR>\n" );
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document.write( "x = -10/(-2)\r<BR>\n" );
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document.write( "x = 5\r<BR>\n" );
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document.write( "The x coordinate of the vertex is at x = 5\r<BR>\n" );
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document.write( "Plug it in to find the max y value\r<BR>\n" );
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document.write( "f(x) = -x^2+10x+9\r<BR>\n" );
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document.write( "f(5) = -(5)^2+10(5)+9\r<BR>\n" );
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document.write( "f(5) = -25+10(5)+9\r<BR>\n" );
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document.write( "f(5) = -25+50+9\r<BR>\n" );
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document.write( "f(5) = 25+9\r<BR>\n" );
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document.write( "f(5) = 34\r<BR>\n" );
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document.write( "So the maximum y value is y = <font color=\"red\">34</font> </SPAN>\n" );
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