document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87709>Question 87709</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The demand equation for a certain type of printer is given by D= -200p + 35,000<BR>\n" );
document.write( "The supply equation is predicted to be S= -p^2+400p-20,000<BR>\n" );
document.write( "Find the equilibrium price. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #63609 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=63609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The demand equation for a certain type of printer is given by D= -200p + 35,000<BR>\n" );
document.write( "The supply equation is predicted to be S= -p^2+400p-20,000<BR>\n" );
document.write( "Find the equilibrium price.<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Equilibrium means demand = supply.<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "-200p + 35,000 = -p^2+400p-20,000<BR>\n" );
document.write( "p^2-600p+55000 = 0\r<BR>\n" );
document.write( "\n" );
document.write( "p = [600+sqrt(600^2-4*1*55000]/2<BR>\n" );
document.write( "Positive answer:<BR>\n" );
document.write( "p = $487.08<BR>\n" );
document.write( "=============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );