document.write( "Question 117441: 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 #85449 by Fombitz(32388) $\"\"$ $\"About$

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A=(4,6,8,9)
\n" ); document.write( "B=(2,4,6,8)
\n" ); document.write( " $\"4%2B2=6\"$
\n" ); document.write( " $\"6%2B2=8\"$
\n" ); document.write( " $\"8%2B2=10\"$
\n" ); document.write( " $\"9%2B2=11\"$
\n" ); document.write( " $\"4%2B4=cross%288%29\"$
\n" ); document.write( " $\"6%2B4=cross%2810%29\"$
\n" ); document.write( " $\"8%2B4=12\"$
\n" ); document.write( " $\"9%2B4=13\"$
\n" ); document.write( " $\"4%2B6=cross%2810%29\"$
\n" ); document.write( " $\"6%2B6=cross%2812%29\"$
\n" ); document.write( " $\"8%2B6=14\"$
\n" ); document.write( " $\"9%2B6=15\"$
\n" ); document.write( " $\"4%2B8=cross%2812%29\"$
\n" ); document.write( " $\"6%2B8=cross%2814%29\"$
\n" ); document.write( " $\"8%2B8=16\"$
\n" ); document.write( " $\"9%2B8=17\"$
\n" ); document.write( "C is the set of all unique sums of members of A and B.
\n" ); document.write( "C=(6,8,10,11,12,13,14,15,16,17)
\n" ); document.write( "C has 10 members in it. \n" ); document.write( "

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