document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1194077>Question 1194077</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Charlie runs a book rental business. He currently charges $3 per book and rents out an average of 38 books a day.\r<BR>\n" );
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document.write( "According to a study, for every 50¢ increase in rental price, the average business can expect to lose 4 rentals a day.\r<BR>\n" );
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document.write( "Complete the equation that models this scenario, where b(x) is the revenue generated and x is the number of 50¢ price increases.\r<BR>\n" );
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document.write( "b(x) = -<BR>\n" );
document.write( "x2 + <BR>\n" );
document.write( "x + \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #826169 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=826169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "x = number of 50-cent price increases<BR>\n" );
document.write( "3+.50x = price per rental after x price increases<BR>\n" );
document.write( "38-4x = number of rentals per day after x price increases<br><BR>\n" );
document.write( "Revenue is number of rentals times price per rental<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%28x%29=%283%2B.50x%29%2838-4x%29 ALIGN=MIDDLE  ALT=\"b%28x%29=%283%2B.50x%29%2838-4x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%28x%29=114-12x%2B19x-2x%5E2 ALIGN=MIDDLE  ALT=\"b%28x%29=114-12x%2B19x-2x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%28x%29=-2x%5E2%2B7x%2B114 ALIGN=MIDDLE  ALT=\"b%28x%29=-2x%5E2%2B7x%2B114\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
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