document.write( "Question 1195571: Can I please have help with this, Thank you! \r
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document.write( "On the grid, sketch the inequalities below and determine the solution region. \r
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document.write( "y is greater than or equal to 0\r
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document.write( "x is greater than or equal to 0\r
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document.write( "y is less than or equal to x+2\r
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document.write( "y is less than or equal to 14-2x
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Algebra.Com's Answer #828102 by math_tutor2020(3816)![]() ![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "We'll have these boundary equations \n" ); document.write( "y = 0 \n" ); document.write( "x = 0 \n" ); document.write( "y = x+2 \n" ); document.write( "y = -2x+14\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The first two equations represent the x axis and y axis in that exact order. \n" ); document.write( "The last equation is equivalent to y = 14 - 2x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Each equation mentioned is a solid line due to the \"or equal to\" as part of the inequality sign.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "We're told that x ≥ 0 and y ≥ 0, which places us in the upper right quadrant. \n" ); document.write( "The shaded region is a subset of this quadrant. Meaning that the shaded region will not be found in any other quadrant.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "To graph out y ≤ x+2, we will shade below the boundary equation y = x+2. This trick only works when y is fully isolated. \n" ); document.write( "Similarly, the graph of y ≤ -2x+14 will also be shaded below its corresponding boundary line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "This is what the final shaded region looks like when we overlap the four inequalities together \n" ); document.write( " ![]() \n" ); document.write( "I used GeoGebra to make this graph. \n" ); document.write( "The input command I typed in was: ( x >= 0) && (y >= 0) && (y <= x+2) && (y <= -2x+14)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Desmos is another tool you can use, and here's the link to the interactive graph: \n" ); document.write( "https://www.desmos.com/calculator/mkjjbdalpl \n" ); document.write( "This is what you would type in x >= 0 { y >= 0 } {y <= x+2} {y <= -2x+14} \n" ); document.write( "The curly braces are important so Desmos knows where one inequality ends and another begins. The first inequality doesn't need curly braces.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Points inside the blue shaded region are solutions to the system of inequalities. \n" ); document.write( "The point (4,1) is one such example. It makes x ≥ 0 and y ≥ 0 true; it also makes y ≤ x+2 and y ≤ -2x+14 true as well.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Confirmation for y ≤ x+2 \n" ); document.write( "y ≤ x+2 \n" ); document.write( "1 ≤ 4+2 \n" ); document.write( "1 ≤ 6 \n" ); document.write( "which is true\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Confirmation for y ≤ -2x+14 \n" ); document.write( "y ≤ -2x+14 \n" ); document.write( "1 ≤ -2(4)+14 \n" ); document.write( "1 ≤ 6 \n" ); document.write( "which is also true \n" ); document.write( "Therefore, the point (4,1) has been confirmed to work for the last two inequalities given. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I'll let you try other points in the blue region.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Points on the boundary directly adjacent to the interior region are solutions as well \n" ); document.write( "However, we cannot include boundary points that aren't next to the blue interior. \n" ); document.write( "Eg: (2,4) is a solution but (-1,1) is not a solution even though it resides on a boundary line \n" ); document.write( "The point (-1,1) doesn't work because it doesn't satisfy x ≥ 0 \n" ); document.write( " \n" ); document.write( " |