document.write( "Question 151526: Solve the system of inequalities by graphing the solution region:\r
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Algebra.Com's Answer #111395 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!

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Jump to Inequality #1
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\n" ); document.write( "\n" ); document.write( "Inequality #1 \r
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\n" ); document.write( "\n" ); document.write( "\"x%2B2y%3C=3\" Start with the 1st inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"2y%3C=3-x\" Subtract \"x\" from both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"y%3C=%283-x%29%2F%282%29\" Divide both sides by \"2\" to isolate \"y\".\r
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\n" ); document.write( "\n" ); document.write( "\"y%3C=-%281%2F2%29x%2B3%2F2\" Simplify.\r
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\n" ); document.write( "\n" ); document.write( "So in order to plot \"x%2B2y%3C=3\" or \"y%3C=-%281%2F2%29x%2B3%2F2\" (which is the same thing), we need to plot the equation \"y=-%281%2F2%29x%2B3%2F2\" first.
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C-%281%2F2%29x%2B3%2F2%29+\" Graph of \"y=-%281%2F2%29x%2B3%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "Now plug in a test point (0,0) into the inequality \"y%3C=-%281%2F2%29x%2B3%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%3C=-%281%2F2%29x%2B3%2F2\" Start with the given inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"0%3C=-%281%2F2%29%2A%280%29%2B3%2F2\" Plug in \"x=0\" and \"y=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"0%3C=3%2F2\" Evaluate and simplify.\r
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\n" ); document.write( "\n" ); document.write( "Since the inequality is true, this means that we shade the entire region that contains the point (0,0)\r
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\n" ); document.write( "\n" ); document.write( "In other words, we simply shade the entire region that is below the line.\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y%3C=-%281%2F2%29x%2B3%2F2\" with the shaded region in green\r
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\n" ); document.write( "\n" ); document.write( "Now move onto the next inequality\r
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\n" ); document.write( "\n" ); document.write( "Inequality #2 \r
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\n" ); document.write( "\n" ); document.write( "\"2x-3y%3C=6\" Start with the 2nd inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"-3y%3C=6-2x\" Subtract \"2x\" from both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"y%3E=%286-2x%29%2F%28-3%29\" Divide both sides by \"-3\" to isolate \"y\". This will flip the inequality sign.\r
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\n" ); document.write( "\n" ); document.write( "\"y%3E=%282%2F3%29x-2\" Simplify.\r
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\n" ); document.write( "\n" ); document.write( "So in order to plot \"2x-3y%3C=6\" or \"y%3E=%282%2F3%29x-2\" (which is the same thing), we need to plot the equation \"y=%282%2F3%29x-2\" first.
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C%282%2F3%29x-2%29+\" Graph of \"y=%282%2F3%29x-2\"\r
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\n" ); document.write( "\n" ); document.write( "Now plug in a test point (0,0) into the inequality \"y%3E=%282%2F3%29x-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%3E=%282%2F3%29x-2\" Start with the given inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"0%3E=%282%2F3%29%2A%280%29-2\" Plug in \"x=0\" and \"y=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"0%3E=-2\" Evaluate and simplify.\r
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\n" ); document.write( "\n" ); document.write( "Since the inequality is true, this means that we shade the entire region that contains the point (0,0)\r
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\n" ); document.write( "\n" ); document.write( "In other words, we simply shade the entire region that is above the line.\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y%3E=%282%2F3%29x-2\" with the shaded region in green\r
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\n" ); document.write( "\n" ); document.write( " Now draw all of the inequalities on the same coordinate system.\r
\n" ); document.write( "\n" ); document.write( " Graph of the 2 inequalities and their shaded regions.\r
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\n" ); document.write( "\n" ); document.write( " The solution region will be the intersecting region of the inequalities.\r
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\n" ); document.write( "\n" ); document.write( " ---------------------------- Solution --------------------------\r
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\n" ); document.write( "\n" ); document.write( " So the solution looks like:\r
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\n" ); document.write( "\n" ); document.write( " Graph of the 2 lines and the final solution region represented by a series of dots.
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