Posted by steve on Sunday, November 28, 2010 at 5:28pm.
find unit rate 40 textbooks weigh 120 pounds

math  Ms. Sue, Sunday, November 28, 2010 at 5:32pm
Use this proportion, cross multiply and solve for x.
40/120 = 1/x

math  Jen, Sunday, November 28, 2010 at 9:07pm
But how do you know all the textbooks weigh the same amount? Poorly written question..
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