document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=215439>Question 215439</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This is my last homework problem for the day:\r<BR>\n" );
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document.write( "New carpeting can be purchased and installed for $22.00 per square yard, plus a $50 delivery fee. (a) Write an equation that gives the cost, c, to carpet “s” square yards. (b) Find the inverse of the cost function. © How many square yards can be carpeted for $1810?\r<BR>\n" );
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document.write( "Is it C(x)=xs+50 and the inverse is c^-1(x)=x-50/s\r<BR>\n" );
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document.write( "80 square yards can be carpeted for $1810\r<BR>\n" );
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document.write( "Did I get it right?\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #162817 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=162817\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm not sure where the x is coming from?<BR>\n" );
document.write( "The equation for the cost (C) of carpeting s square yards at $22.00 per square yard plus %50.00 for delivery would be:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28C%28s%29+=+22s%2B50%29 ALIGN=MIDDLE  ALT=\"highlight%28C%28s%29+=+22s%2B50%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "To find the inverse of this function, exchange the dependent variable (C) with the independent variable (s) and solve for C.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C+=+22s%2B50 ALIGN=MIDDLE  ALT=\"C+=+22s%2B50\"   DISABLED_style= \"max-width:90%; height:auto;\" > Exchange C and s.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+22C%2B50 ALIGN=MIDDLE  ALT=\"s+=+22C%2B50\"   DISABLED_style= \"max-width:90%; height:auto;\" > Solve this for C. Subtract 50 from both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s-50+=+22C ALIGN=MIDDLE  ALT=\"s-50+=+22C\"   DISABLED_style= \"max-width:90%; height:auto;\" > Divide both sides by 22 to get the inverse function <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%5E%28-1%29%28s%29 ALIGN=MIDDLE  ALT=\"C%5E%28-1%29%28s%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%5E%28-1%29%28s%29+=+%28s-50%29%2F22 ALIGN=MIDDLE  ALT=\"C%5E%28-1%29%28s%29+=+%28s-50%29%2F22\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "To check to see if you have correct inverse, find the composite of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C ALIGN=MIDDLE  ALT=\"C\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%5E%28-1%29 ALIGN=MIDDLE  ALT=\"C%5E%28-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, why? Because <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28C%5E%28-1%29%28s%29%29+=+s ALIGN=MIDDLE  ALT=\"C%28C%5E%28-1%29%28s%29%29+=+s\"   DISABLED_style= \"max-width:90%; height:auto;\" > if <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%5E%28-1%29%28s%29 ALIGN=MIDDLE  ALT=\"C%5E%28-1%29%28s%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the inverse of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28s%29 ALIGN=MIDDLE  ALT=\"C%28s%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > :<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28%28C%5E%28-1%29%29%28s%29%29+=+s ALIGN=MIDDLE  ALT=\"C%28%28C%5E%28-1%29%29%28s%29%29+=+s\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28C%5E%28-1%29%29+=+C%28%28s-50%29%2F22%29 ALIGN=MIDDLE  ALT=\"C%28C%5E%28-1%29%29+=+C%28%28s-50%29%2F22%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28%28s-500%29%2F22%29+=+22%28%28s-50%29%2F22%29%2B50 ALIGN=MIDDLE  ALT=\"C%28%28s-500%29%2F22%29+=+22%28%28s-50%29%2F22%29%2B50\"   DISABLED_style= \"max-width:90%; height:auto;\" >=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s ALIGN=MIDDLE  ALT=\"s\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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