document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=136056>Question 136056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do i solve the following problems :\r<BR>\n" );
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document.write( "1)A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 apiece; when the price is lowered to $80, the company sells 10.2 million players per month.  How many MP3 players can the company expect to sell per month at a price of $75?\r<BR>\n" );
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document.write( "2)Sales tax in Pennsylvania is 6%.  Create an equation for the total price (cost plus tax) of a purchase in PA in terms of its cost.  How much would a person pay for a car whose cost is $32,000?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #99667 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=99667\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 a piece; when the price is lowered to $80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price of $75? <BR>\n" );
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document.write( "You have two points: (100,6.7) and (80,10.2)<BR>\n" );
document.write( "slope = (10.2-6.7)/(80-100) = -7/40<BR>\n" );
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document.write( "Form: y = mx + b<BR>\n" );
document.write( "You have y,x,m; solve for \"b\":<BR>\n" );
document.write( "6.7 = (-7/40)*100 + b<BR>\n" );
document.write( "b = 6.7 + 17.5<BR>\n" );
document.write( "b = 24.2<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "# sold = (-7/40)x +24.2 million where x is price per unit<BR>\n" );
document.write( "#(75) = (-7/40)*75 + 24.2<BR>\n" );
document.write( "#(75) = 11.075 million<BR>\n" );
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document.write( "2)Sales tax in Pennsylvania is 6%. Create an equation for the total price (cost plus tax) of a purchase in PA in terms of its cost. How much would a person pay for a car whose cost is $32,000? <BR>\n" );
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document.write( "Pay = cost + 0.06*cost<BR>\n" );
document.write( "P = c(1+0.06)<BR>\n" );
document.write( "P = 1.06c<BR>\n" );
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document.write( "P(32000) = 1.06*32000 = $33920.00<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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