document.write( "Question 478429: i need to figure out the equation of 8x-10y=-80 and -2x-9y=18 then graph it to the y intercept and slope it and then figure out the intersection \n" ); document.write( "

Algebra.Com's Answer #327811 by mananth(16946) $\"\"$ $\"About$

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8 x -10 y = -80 .............1
\n" ); document.write( "-2 x -9 y = 18 .............2
\n" ); document.write( "
\n" ); document.write( "multiply (1)by -9
\n" ); document.write( "Multiply (2) by 10
\n" ); document.write( "-72 x + 90 y = 720
\n" ); document.write( "-20 x -90 y = 180
\n" ); document.write( "Add the two equations
\n" ); document.write( "-92 x = 900
\n" ); document.write( "/ -92
\n" ); document.write( "x = -9.78 ==> -88/9
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "8 x + -10 y = -80
\n" ); document.write( "-78.26 + -10 y = -80
\n" ); document.write( " -10 y = -80 + 78.26
\n" ); document.write( " -10 y = -1.74
\n" ); document.write( " y=1.74
\n" ); document.write( "Determine the intercep[t points of both the lines
\n" ); document.write( "equation1
\n" ); document.write( "when x= 0 y= 8 ( 0 , 8 )
\n" ); document.write( "when y = 0 x= -10 ( -10 , 0 )
\n" ); document.write( "Equation 2
\n" ); document.write( "when x= 0 y= -2 ( 0 , -2 )
\n" ); document.write( "when y = 0 x= -9 ( -9 , 0 )
\n" ); document.write( " y = 0.17 ==> 1/6
\n" ); document.write( "

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\n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( "

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