document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=78717>Question 78717</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Business and finance. There are 850 Douglas fir and ponderosa pine trees in a<BR>\n" );
document.write( "section of forest bought by Sawz Logging Co. The company paid an average of<BR>\n" );
document.write( "$300 for each Douglas fir and $225 for each ponderosa pine. If the company paid<BR>\n" );
document.write( "$217,500 for the trees, how many of each kind did the company buy?<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 #56564 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=56564\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> There are 850 Douglas fir and ponderosa pine trees in a<BR>\n" );
document.write( "section of forest bought by Sawz Logging Co. The company paid an average of<BR>\n" );
document.write( "$300 for each Douglas fir and $225 for each ponderosa pine. If the company paid<BR>\n" );
document.write( "$217,500 for the trees, how many of each kind did the company buy?<BR>\n" );
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document.write( "Let D = number of Douglas firs; P = number of Ponderosas<BR>\n" );
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document.write( "Total trees:<BR>\n" );
document.write( "D + P = 850<BR>\n" );
document.write( "or<BR>\n" );
document.write( "D = 850 - P<BR>\n" );
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document.write( "Cost of all the trees:<BR>\n" );
document.write( "300D + 225P = 217500<BR>\n" );
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document.write( "Substitute (850-P) for D, solve for P:<BR>\n" );
document.write( "300(850-P) + 225P = 217500<BR>\n" );
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document.write( "255000 - 300P + 225P = 217500<BR>\n" );
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document.write( "-300P + 225P = 217500 - 255000<BR>\n" );
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document.write( "-75P = -37500<BR>\n" );
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document.write( "P = -37500/-75<BR>\n" );
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document.write( "P = 500 Ponderosa trees<BR>\n" );
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document.write( "850 - 500 = 350 Douglas firs.<BR>\n" );
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document.write( "Check: <BR>\n" );
document.write( "225(500) + 300(350) =<BR>\n" );
document.write( " 112500  +  105000  = 217500  </SPAN>\n" );
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