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June 2nd, 2009, 03:48 PM  #1 
Newbie Joined: Jun 2009 Posts: 5 Thanks: 0  confused with math homework! please help!
1.) If m/n=1/3, which of the following must be true? I. 3m=n II. m=3n III. m+1=(n+3)/3 IV. mn=3 (1) I only (2) I and II only (3) I and III only (4) I and IV only 
June 2nd, 2009, 09:00 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 21,036 Thanks: 2274 
Try using m = 2 and n = 6.

June 3rd, 2009, 04:33 AM  #3 
Newbie Joined: Jun 2009 Posts: 5 Thanks: 0  Re: confused with math homework! please help!
thank you! 
June 3rd, 2009, 06:26 AM  #4 
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: confused with math homework! please help!
In future it might be helpful if you "cross multiply": IF a/b = c/d, THEN ad = bc etc.


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