document.write( "Question 117449: Let A be the set of all composites less than 10, and B be the set of positive even integers less than 10. How many different sums of the form a + b are possible if a is in A and b is in B? \n" ); document.write( "

Algebra.Com's Answer #85984 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Let A be the set of all composites less than 10,\r\n" );
document.write( "and B be the set of positive even integers less \r\n" );
document.write( "than 10. How many different sums of the form a + b \r\n" );
document.write( "are possible if a is in A and b is in B?\r\n" );
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document.write( "A = {4,6,8,9}\r\n" );
document.write( "B = {2,4,6,8}\r\n" );
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document.write( "Make an addition table:\r\n" );
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document.write( "+ A  4   6   8   9\r\n" );
document.write( "B  覧覧覧覧覧覧覧予r\n" );
document.write( "2 |  6   8  10  11\r\n" );
document.write( "  |\r\n" );
document.write( "4 |  8  10  12  13\r\n" );
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document.write( "6 | 10  12  14  15\r\n" );
document.write( "  |\r\n" );
document.write( "8 | 12  14  16  17\r\n" );
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document.write( "The different sums are\r\n" );
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document.write( "6, 8, 10, 11, 12, 13, 14, 15, 16, 17\r\n" );
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document.write( "So there are 10 different sums.\r\n" );
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document.write( "Edwin

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