document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=205709>Question 205709</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, I need help on my summer assignment, i did all of them except two...which i don't know how to do. I'm so sorry, they have parts to them.\r<BR>\n" );
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document.write( "The first one is :<BR>\n" );
document.write( "\"A Glass mirror is selling mirrors with frames. The store charges 10 cents for each square inch of mirror and 25 cents for each linear inch of frame.<BR>\n" );
document.write( "A.  Show that a 20 inch by 30 inch mirror should cost 85 dollars<BR>\n" );
document.write( "(I tried solving this by multiplying the money by the inches, and    by finding the area and stuff but either it equals more or less.)<BR>\n" );
document.write( "B.   If there was a mirror that measures 40 inches on one side, what would the other measurement be if the price were still 85 dollars<BR>\n" );
document.write( "C.   Write an equation that determines the price (p) given length (l) and width (W) <BR>\n" );
document.write( "D.   Solve this equation for L\"\r<BR>\n" );
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document.write( "If you could just do A and B that would be great because then i could figure out c and D since u will show me the work and how u did it so I know....Thank You soooo much~! <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 #155331 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=155331\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (A)  Cost = .10*Area + .25* Perimeter<BR>\n" );
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document.write( "If l=30,,& w=20,,,,Area = L*W,,,,Per = 2L + 2W<BR>\n" );
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document.write( "cost = .10(30*20) +.25( 2*30+2*20)<BR>\n" );
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document.write( "Cost = .10(600) + .25(100)<BR>\n" );
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document.write( "Cost = 60 + 25 = $ 85<BR>\n" );
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document.write( "(B)  Let L=40,,,,find  W<BR>\n" );
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document.write( "Cost = .1A + .25P = .1(40*W) + .25( 2*40+2*W)= 4W + 20 + .5W = 4.5 W +20<BR>\n" );
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document.write( "If  Cost  is  $ 85,,85=4.5W +20,,,,65 = 4.5 W,,,,W= 14.444 in.<BR>\n" );
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document.write( "(C),,,, Cost  = .1Area + .25Per<BR>\n" );
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document.write( "C= .1(L*W) + .25(2L+2W)<BR>\n" );
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document.write( "C= .1LW + .5L +.5W<BR>\n" );
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document.write( "(D)  C-.5W = L (.1W +.5)<BR>\n" );
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document.write( "(C-.5W) / (.1W +.5) = L,,,,,,checking  with  original(20*30=$85),,,ok\r<BR>\n" );
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