document.write( "Question 369416: find the x and y intercepts and graph the equation plotting the intercepts. Show all work. -3x - 7y = 21 \n" ); document.write( "

Algebra.Com's Answer #263234 by mananth(16946) $\"\"$ $\"About$

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-3x - 7y = 21
\n" ); document.write( "add 3x
\n" ); document.write( "-3x+3x-7y=3x+21
\n" ); document.write( "-7y=3x+21
\n" ); document.write( "/-7
\n" ); document.write( "y=(-3/7)x +(2/7)
\n" ); document.write( "compare with the equation in the slope intercept form y = mx +b
\n" ); document.write( "(2/7) is the y intercept.
\n" ); document.write( "co-ordinates are (0,2/7)
\n" ); document.write( "..
\n" ); document.write( "For x intercept plug y =0
\n" ); document.write( "(-3/7)x +(2/7)=0
\n" ); document.write( "..
\n" ); document.write( "(-3/7)x = -(2/7)
\n" ); document.write( "multiply by 7
\n" ); document.write( "-3x=-2
\n" ); document.write( "/-3
\n" ); document.write( "x= -2/3
\n" ); document.write( "the co-ordinates are(-2/3,0)
\n" ); document.write( "...
\n" ); document.write( " $\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C%28-3%2F7%29x+%2B%282%2F7%29%29\"$
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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