document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=494776>Question 494776</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help!! <BR>\n" );
document.write( "I need answers to the following questions, I really need to past this test.\r<BR>\n" );
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document.write( "1) In solving the equation (x + 1)(x – 2) = 54, Eric stated that the solution would be<BR>\n" );
document.write( "x + 1 = 54 => x = 53 or (x – 2) = 54 => x = 56<BR>\n" );
document.write( "However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning. \r<BR>\n" );
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document.write( "2)If a stone is tossed from the top of a 190 meter building, the height of the stone as a function of time is given by h(t) = -9.8t^2 -10t +190, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer. \r<BR>\n" );
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document.write( "3) Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.   <BR>\n" );
document.write( "8x^2 + 2x + 4 = 0 <BR>\n" );
document.write( "A) Two different irrational solutions<BR>\n" );
document.write( "B) Two different imaginary solutions<BR>\n" );
document.write( "C)Exactly one rational solution<BR>\n" );
document.write( "D)Two different rational solutions\r<BR>\n" );
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document.write( "4) Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.   <BR>\n" );
document.write( "18x + 6y = 78<BR>\n" );
document.write( "12x + 54y = -48 \r<BR>\n" );
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document.write( "5)Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. <BR>\n" );
document.write( "14x+18y =-54<BR>\n" );
document.write( "-4x-14y = 42 \r<BR>\n" );
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document.write( "Please I need the answers to these questions ASAP like yesterday. Been trying all day to figure out the answers to the above 5 questions, thank you<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 #335797 by </B><A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><B>sudhanshu_kmr(1152)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><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=sudhanshu_kmr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=335797\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Such equations are called quadratic equations. Use factorization method or\r<BR>\n" );
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document.write( "quadratic formula to solve such equations. \r<BR>\n" );
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document.write( "(x + 1)(x – 2) = 54\r<BR>\n" );
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document.write( "=> x^2 -2x + x  -2 = 54\r<BR>\n" );
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document.write( "=> x^2 -x -56 =0\r<BR>\n" );
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document.write( "=> x^2 -8x +7x -56 =0\r<BR>\n" );
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document.write( "=> x(x-8) + 7(x -8)= 0\r<BR>\n" );
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document.write( "=>(x+7)(x-8) = 0\r<BR>\n" );
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document.write( "x= -7, or 8 .\r<BR>\n" );
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