document.write( "Question 118702: My brain is on shut down from all my equations and this problem has me lost. Help Please!! Angela\r
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document.write( "Solve the following system of linear inequalities by graphing.
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document.write( " x – y <= 3 x + 2y <=6
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Algebra.Com's Answer #86832 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! x – y <= 3; x + 2y <=6 \n" ); document.write( ": \n" ); document.write( "Put both equations in the \"y =\" form that we can graph:\r \n" ); document.write( "\n" ); document.write( "x - y <= 3 \n" ); document.write( "-y <= -x + 3 \n" ); document.write( "We need y to be positive, mult by -1, this reverses the inequality sign \n" ); document.write( "y >= x - 3 \n" ); document.write( "and \n" ); document.write( "x + 2y <= 6 \n" ); document.write( "2y <= -x + 6 \n" ); document.write( "y <= -.5x + 3; divided equation by 2 \n" ); document.write( ": \n" ); document.write( "Plot the lines of these two equations: they should look like this: \n" ); document.write( "y >= x - 3; purple \n" ); document.write( "y <= -.5x + 3; green \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "Shade the area at and above the purple line \n" ); document.write( "Shade the area at and below the green line \n" ); document.write( ": \n" ); document.write( "The solution area is the portion that is shaded by both, (a triangular area that opens to the left) \n" ); document.write( ": \n" ); document.write( "Did this help? If you don't know how to plot a graph, let me know, and we can go over that. \n" ); document.write( " |