document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28857>Question 28857</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the inverse function of f(x)=5x-9 and verify that they are inverses of each other  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15754 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15754\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x) = 5x-9\r<BR>\n" );
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document.write( "--> y = 5x-9<BR>\n" );
document.write( "y+9 = 5x<BR>\n" );
document.write( "--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%28y%2B9%29%2F5+ ALIGN=MIDDLE  ALT=\"+x+=+%28y%2B9%29%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so, the inverse function is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%5E%28-1%29%28x%29+=+%28x%2B9%29%2F5+ ALIGN=MIDDLE  ALT=\"+f%5E%28-1%29%28x%29+=+%28x%2B9%29%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Verify...\r<BR>\n" );
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document.write( "pick any value of x and put it into f(x) to get a value of f(x).\r<BR>\n" );
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document.write( "f(1) = 5(1)-9<BR>\n" );
document.write( "f(1) = 5-9<BR>\n" );
document.write( "f(1) = -4\r<BR>\n" );
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document.write( "So, now put -4 into the inverse function and the answer we expect is 1.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%5E%28-1%29%28-4%29+=+%28-4%2B9%29%2F5+ ALIGN=MIDDLE  ALT=\"+f%5E%28-1%29%28-4%29+=+%28-4%2B9%29%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%5E%28-1%29%28-4%29+=+5%2F5+ ALIGN=MIDDLE  ALT=\"+f%5E%28-1%29%28-4%29+=+5%2F5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%5E%28-1%29%28-4%29+=+1+ ALIGN=MIDDLE  ALT=\"+f%5E%28-1%29%28-4%29+=+1+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "jon.<BR>\n" );
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