document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=808293>Question 808293</A>: <I><SPAN STYLE=\"word-break: break-all;\">                                                                                x and y\r<BR>\n" );
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document.write( "In a table if 1 is x and y is 2                     <BR>\n" );
document.write( "In the same table 2 is x and y 8<BR>\n" );
document.write( "In the same table 3 is x and y is 9<BR>\n" );
document.write( "then if 10 is the value of x what is the value of y? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #487026 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=487026\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x and y<BR>\n" );
document.write( "In a table if 1 is x and y is 2<BR>\n" );
document.write( "In the same table 2 is x and y 8<BR>\n" );
document.write( "In the same table 3 is x and y is 9<BR>\n" );
document.write( "then if 10 is the value of x what is the value of y?<BR>\n" );
document.write( " x | y<BR>\n" );
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document.write( " 1 | 2<BR>\n" );
document.write( " 2 | 8<BR>\n" );
document.write( " 3 | 9<BR>\n" );
document.write( "10 | ?<BR>\n" );
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document.write( "I think this is a quadratic equation, using the form ax^2 + bx + c = y<BR>\n" );
document.write( "Find a b and c<BR>\n" );
document.write( "x=1<BR>\n" );
document.write( "a + b + c =2<BR>\n" );
document.write( "x =2<BR>\n" );
document.write( "4a + 2b + c = 8<BR>\n" );
document.write( "x=3<BR>\n" );
document.write( "9a + 3b + c = 9<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Subtract the 1st equation from the 2nd<BR>\n" );
document.write( "4a + 2b + c = 8<BR>\n" );
document.write( " a + b +  c = 2<BR>\n" );
document.write( "---------------eliminates c<BR>\n" );
document.write( "3a + b = 6<BR>\n" );
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document.write( "Subtract the 1st equation from the 3rd<BR>\n" );
document.write( "9a + 3b + c = 9<BR>\n" );
document.write( " a + b  + c = 2<BR>\n" );
document.write( "---------------- eliminates c again<BR>\n" );
document.write( "8a + 2b = 7<BR>\n" );
document.write( "multiply 3a + b = 6 by 2 and subtract from the above equation<BR>\n" );
document.write( "8s + 2b = 7<BR>\n" );
document.write( "6a + 2b = 12<BR>\n" );
document.write( "-------------eliminates b find a<BR>\n" );
document.write( "2a = -5<BR>\n" );
document.write( "a = -2.5<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Find b<BR>\n" );
document.write( "3(-2.5) + b = 6<BR>\n" );
document.write( "-7.5 + b = 6<BR>\n" );
document.write( "b = 6 + 7.5<BR>\n" );
document.write( "b = 13.5<BR>\n" );
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document.write( "Find c using the 1st equation, replacing a and b<BR>\n" );
document.write( "-2.5 + 13.5 + c = 2<BR>\n" );
document.write( "11 + c = 2<BR>\n" );
document.write( "c = 2 - 11<BR>\n" );
document.write( "c = -9<BR>\n" );
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document.write( "Our equation: y = -2.5x^2 + 13.5x - 9<BR>\n" );
document.write( "x = 10<BR>\n" );
document.write( "y = -2.5(10^2) + 13.5(10) - 9 <BR>\n" );
document.write( "y = -250 + 135 - 9<BR>\n" );
document.write( "y = -124 when x = 10<BR>\n" );
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document.write( "You can confirm this for each value of x, find y </SPAN>\n" );
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