document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1153754>Question 1153754</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help on how to find the equation in quadratic word problems and my teacher doesn't teach very well. I am okay with most of the ways on how to use the quadratic formula and get standard form but I don't get how you find an equation using the information given in the word problem. I have tried asking for help and looking online but I still don't get it.\r<BR>\n" );
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document.write( "1) A rectangular piece of tin 40cm by 30cm is to be made into an open box with a base of 900cm^2 by cutting equal squares from the four corners and then bending up the sides. FInd the length of the side of the square cut from each corner.\r<BR>\n" );
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document.write( "2) Pete drove from Buffalo to Boston, a distance of 4000km. On the return trip, the speed was increased by 300km/h. If the total trip (There and back) took 13hours, what was the speed from montreal to San Fransico. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #776037 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52781)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=776037\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "Problem 1)\r<BR>\n" );
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document.write( "After cutting the squares and then bending, the dimensions of the base of the box will be  (40-2x) cm and (30-2x) cm,\r\n" );
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document.write( "where x is the side of the square.\r\n" );
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document.write( "It is the first and the major step in the solution.\r\n" );
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document.write( "Then the area of the base of the box is the product  (40-2x)*(30-2x).\r\n" );
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document.write( "It should be equal to 900 cm^2, which gives you the equation\r\n" );
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document.write( "    (40-2x)*(30-2x) = 900.\r\n" );
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document.write( "Next, you should simplify it; reach a quadratic equation in standard form, simplify and solve.\r\n" );
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document.write( "Problem 2)\r<BR>\n" );
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document.write( "Please read your post to ensure that part 2) is NONSENSE.\r<BR>\n" );
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document.write( "PLEASE AVOID POSTING nonsense to this forum.\r<BR>\n" );
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document.write( "I don't like it VERY MUCH.\r<BR>\n" );
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document.write( "Also, NEVER post more than one problem/question per post.\r<BR>\n" );
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document.write( "It is the policy, the rule  and the REQUIREMENT of this forum.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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