document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=486771>Question 486771</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Some One please help to solve this<BR>\n" );
document.write( "The total cost curve of the number of copies photograph is linear. The total cost of 5 and 18 copies of photographs are Rs.80 and 116 respectively . Then the total cost for 10 copies of the photographs is<BR>\n" );
document.write( "Answer is 93.85<BR>\n" );
document.write( "I don’t know how to do ???? please Explain\r<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 #332793 by </B><A HREF=/tutors/aboutme.mpl?userid=chessace><B>chessace(471)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chessace><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=chessace><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=332793\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let c(x) be cost of x copies.<BR>\n" );
document.write( "Linear means c(x) = ax + b<BR>\n" );
document.write( "c(5) = 80<BR>\n" );
document.write( "c(18) = 116<BR>\n" );
document.write( "Find c(10)<BR>\n" );
document.write( "a*5 + b = 80<BR>\n" );
document.write( "a*18 + b = 116<BR>\n" );
document.write( "Subtract 1 from 2:<BR>\n" );
document.write( "13*a = 36<BR>\n" );
document.write( "a = 36/13 = 2.77<BR>\n" );
document.write( "2.77*5 + b = 80<BR>\n" );
document.write( "b = 80-13.846 = 66.154<BR>\n" );
document.write( "c(10) = 10 * 2.77 + 66.15<BR>\n" );
document.write( "c(10) = 93.85<BR>\n" );
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