document.write( "Question 1001320: if ab=13 and bc=5 then must ac=18?
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Algebra.Com's Answer #618554 by Alan3354(69443)\"\" \"About 
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if ab=13 and bc=5 then must ac=18?
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\n" ); document.write( "No.
\n" ); document.write( "c might be between a and b.
\n" ); document.write( "Or a, b & c might not be colinear.
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