document.write( "Question 1193332: We have trapezoid ABCD with AB ∥ DC also, M and N are midpoints of AD and BC, respectively.
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Algebra.Com's Answer #825494 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "The midline of a trapezoid is the average of the two parallel sides:\r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%28AB%2BDC%29%2F2\"\r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%28%284x%2B5%29%2B%286x-3%29%29%2F2\" \r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%284x%2B5%2B6x-3%29%2F2\"\r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%2810x%2B2%29%2F2\"  \r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%282%285x%2B1%29%29%2F2\"  \r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"%28cross%282%29%285x%2B1%29%29%2Fcross%282%29\" \r\n" );
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document.write( "\"MN\"\"%22%22=%22%22\"\"5x%2B1\" \r\n" );
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document.write( "Edwin
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