document.write( "Question 1054739: It takes Bethany 3 hours to proof a chapter of Hawkes Learning Systems' College Algebra book and it takes Nina 6 hours. How long would it take them working together? (Round your answer to two decimal places.) \n" ); document.write( "
Algebra.Com's Answer #669942 by Alan3354(69443)\"\" \"About 
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3*6/(3+6) hours \n" ); document.write( "
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