document.write( "Question 548285: Graph 2x+5y > or equal to 10 \n" ); document.write( "
Algebra.Com's Answer #356864 by mathie123(224)\"\" \"About 
You can put this solution on YOUR website!
Let's first graph the line
\n" ); document.write( "\"2x%2B5y=10\"
\n" ); document.write( "We will put this into slope-intercept form to make this easier:
\n" ); document.write( "\"2x%2B5y=10\"
\n" ); document.write( "\"5y=10-2x\"
\n" ); document.write( "\"y=2-%282%2F5%29%2Ax\"
\n" ); document.write( "\"y=-%282%2F5%29%2Ax%2B2\"\r
\n" ); document.write( "\n" ); document.write( "So this line looks like
\n" ); document.write( "\"graph%28300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C+-%282%2F5%29%2Ax%2B2%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now, our graph is essentially broken up into two regions. We can take a point in each region and \"test it\". ((You can pick any points... because I like work to be easy... I will pick points on the x or y axis so I have a zero to deal with) \r
\n" ); document.write( "\n" ); document.write( "For the lower region I will use (0, 0)
\n" ); document.write( "so
\n" ); document.write( "\"2x%2B5y%3E=10\"
\n" ); document.write( "\"2%2A0%2B5%2A0%3E=10\"
\n" ); document.write( "\"0%3E=10\"
\n" ); document.write( "This is not true, so we cannot shade this region. \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "For the upper region I will use (0,3)
\n" ); document.write( "\"2x%2B5y%3E=10\"
\n" ); document.write( "\"2%2A0%2B5%2A3%3E=10\"
\n" ); document.write( "\"15%3E=10\"\r
\n" ); document.write( "\n" ); document.write( "This is true, so I can shade the upper region.
\n" ); document.write( "Since
\n" ); document.write( "\"2x%2B5y%3E=10\"
\n" ); document.write( "Has a = to 10, the line will be solid.... if however it was just >, the line would be dotted as the region would get really close to the line but would never touch the line. \r
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\n" ); document.write( "\n" ); document.write( "Hopefully this helps, let me know if you are still unsure:)
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