document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=172025>Question 172025</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi can anyone help me with these two? I have been on them since early this morning and can't seem to get it.  Actualy, there are 8 problems, but if I can get these two going, I think I can figure out the rest. I do appreciate any help you can give me.\r<BR>\n" );
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document.write( "Word problem:<BR>\n" );
document.write( "The population of North America is growing rapidly. The equation that predicts this growth is -5.4x+y=372, where x is the number of years since 1980 and y is the population in millions of people. The population of South America is also growing rapidly. The equation that predicts this growth is -5.25x+y=242, where x is the number of years since 1980 and y is the population in millions of people.\r<BR>\n" );
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document.write( "1.	According to these equations, what was the population of North America in 1980? In 2000? What will the estimated population be in 2010?\r<BR>\n" );
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document.write( "2.	According to these equations, what was the population of South America in 1980? In 2000? What will the estimated population be in 2010? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #127072 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=127072\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1)<BR>\n" );
document.write( "If <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the number of years since 1980, then in 1980 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+0 ALIGN=MIDDLE  ALT=\"x+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Putting this into the equation for N. America,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.4%2A0+%2B+y+=+372 ALIGN=MIDDLE  ALT=\"-5.4%2A0+%2B+y+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+372 ALIGN=MIDDLE  ALT=\"y+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There were 372 million people in N. America in 1980<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "In 2000, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+20 ALIGN=MIDDLE  ALT=\"x+=+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.4%2A20+%2B+y+=+372 ALIGN=MIDDLE  ALT=\"-5.4%2A20+%2B+y+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-108+%2B+y+=+372 ALIGN=MIDDLE  ALT=\"-108+%2B+y+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+372+%2B+108 ALIGN=MIDDLE  ALT=\"y+=+372+%2B+108\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+480 ALIGN=MIDDLE  ALT=\"y+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There were 480 million people in N. America in 2000<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "In 2010, there will be<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.4%2A30+%2B+y+=+372 ALIGN=MIDDLE  ALT=\"-5.4%2A30+%2B+y+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+372+%2B+162 ALIGN=MIDDLE  ALT=\"y+=+372+%2B+162\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+534 ALIGN=MIDDLE  ALT=\"y+=+534\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There will be 534 million people in N. America in 2010<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "(2)<BR>\n" );
document.write( "In S. America, in 1980<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.25%2A0+%2B+y+=+242 ALIGN=MIDDLE  ALT=\"-5.25%2A0+%2B+y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+242 ALIGN=MIDDLE  ALT=\"y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There were 242 million people in S. America in 1980<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "In 2000<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.25%2A20+%2B+y+=+242 ALIGN=MIDDLE  ALT=\"-5.25%2A20+%2B+y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-105+%2B+y+=+242 ALIGN=MIDDLE  ALT=\"-105+%2B+y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+347 ALIGN=MIDDLE  ALT=\"y+=+347\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There were 347 million people in S. America in 2000<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "In 2010,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5.25%2A30+%2B+y+=+242 ALIGN=MIDDLE  ALT=\"-5.25%2A30+%2B+y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-157.5+%2B+y+=+242 ALIGN=MIDDLE  ALT=\"-157.5+%2B+y+=+242\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+399.5 ALIGN=MIDDLE  ALT=\"y+=+399.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "There will be 399.5 million people in S. America in 2010 </SPAN>\n" );
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