document.write( "Question 703349: If angles A and B are supplementary to angles C and D, such that angles C and D are complementary, then the sum of angles A and B is...\r
\n" ); document.write( "\n" ); document.write( "a)90
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\n" ); document.write( "d)360
\n" ); document.write( "e)450
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Algebra.Com's Answer #433456 by jim_thompson5910(35256)\"\" \"About 
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A+C = 180\r
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\n" ); document.write( "\n" ); document.write( "B + D = 180\r
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\n" ); document.write( "\n" ); document.write( "C + D = 90\r
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\n" ); document.write( "\n" ); document.write( "Add the first two equations\r
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\n" ); document.write( "\n" ); document.write( "A + B + C + D = 180 + 180\r
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\n" ); document.write( "\n" ); document.write( "A + B + (C + D) = 360\r
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\n" ); document.write( "\n" ); document.write( "A + B + 90 = 360\r
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\n" ); document.write( "\n" ); document.write( "A + B = 360 - 90\r
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\n" ); document.write( "\n" ); document.write( "A + B = 270\r
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\n" ); document.write( "\n" ); document.write( "So the answer is choice C
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