document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=883703>Question 883703</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An ice cream vendor sells an average of 100 cones per day when the price of each cone is $10.00. The vendor believes that for each 50 – cents drop in the price, she will sell 20 more cones. What should the price of the cones be if she wants a revenue of $1440?<BR>\n" );
document.write( "Pls. Show me the solutions. May thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #533704 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=533704\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ____y_________________x<BR>\n" );
document.write( "Cones Sell__________Price<BR>\n" );
document.write( "100_________________10.00<BR>\n" );
document.write( "100+20_______________9.50<BR>\n" );
document.write( "100+2*20____________10.00-2*0.50<BR>\n" );
document.write( "100+3*20____________10.00-3*0.50\r<BR>\n" );
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document.write( "The slope is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=-20%2F0.5=-40 ALIGN=MIDDLE  ALT=\"m=-20%2F0.5=-40\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "A point known, as well as others, is (10,100).<BR>\n" );
document.write( "y = How many cones sold.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-100=-40%28x-10%29 ALIGN=MIDDLE  ALT=\"y-100=-40%28x-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > in point-slope form.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-100=-40x%2B400 ALIGN=MIDDLE  ALT=\"y-100=-40x%2B400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28y=-40x%2B500%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y=-40x%2B500%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "REVENUE:  This is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=QuantitySold%2APrice ALIGN=MIDDLE  ALT=\"QuantitySold%2APrice\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Quantity Sold = y<BR>\n" );
document.write( "Price = x<BR>\n" );
document.write( "Revenue is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%2Ax=%28-40x%2B500%29%2Ax ALIGN=MIDDLE  ALT=\"y%2Ax=%28-40x%2B500%29%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" >, but we are then really focusing on the function <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-40x%2B500%29%2Ax ALIGN=MIDDLE  ALT=\"%28-40x%2B500%29%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" > and want to equate this revenue expression (function) to $1440.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28-40x%5E2%2B500x=1440%29 ALIGN=MIDDLE  ALT=\"highlight_green%28-40x%5E2%2B500x=1440%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Simplify.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4x%5E2%2B50x=144 ALIGN=MIDDLE  ALT=\"-4x%5E2%2B50x=144\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2x%5E2%2B25x-72=0 ALIGN=MIDDLE  ALT=\"-2x%5E2%2B25x-72=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%282x%5E2-25x%2B72=0%29 ALIGN=MIDDLE  ALT=\"highlight_green%282x%5E2-25x%2B72=0%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Quadratic Formula Solution:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=D=25%5E2-4%2A2%2A72=625-8%2A72=49 ALIGN=MIDDLE  ALT=\"D=25%5E2-4%2A2%2A72=625-8%2A72=49\"   DISABLED_style= \"max-width:90%; height:auto;\" >, the discriminant<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%2825%2B-+7%29%2F4 ALIGN=MIDDLE  ALT=\"x=%2825%2B-+7%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=18%2F4=9%2F2=highlight%284.5%29 ALIGN=MIDDLE  ALT=\"x=18%2F4=9%2F2=highlight%284.5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OR<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=32%2F4=highlight%288.0%29 ALIGN=MIDDLE  ALT=\"x=32%2F4=highlight%288.0%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Either of the two prices, $4.50 or $8.00 per cone would be expected to give the revenue 1440 dollars. </SPAN>\n" );
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