Hi guys, Can somebody explain it to me please. Is x > y ? 1) 9x=4y 2)x > -y Thanks a lot [/quote]

9x=4y is sufficient to answer, hence either A or D x>-y is not sufficient, hence A.

2008 wrote:9x=4y is sufficient to answer, hence either A or D x>-y is not sufficient, hence A. Wouldn't it be E because: 9x = 4y ----> x = (4/9)y here when x = -4/9 y= -1 x> y when x = 4/9 y=1 x<y therefore A is not sufficient. B is also not sufficient Thus, E. What's the oA?

The answer should be E. Statement I 9x=4y x=4 y=9 36=36, x y Hence Insufficient. Statement II x>-y It does not tell us anything about positive y, therefore insufficient. Hence the answer is E. Whats the OA?

Hi guys it is me again. Thanks for all the answers and I also agree with you and I say that the answer is letter E. However, this problem comes form the GMAT Kaplan book and in the answers it actually said that the right answer is letter C. I read the explainations already but I still do not get it. What do you think about this ???

parallel_chase wrote:The answer should be E. Statement I 9x=4y x=4 y=9 36=36, x y SEE the second condition Hence Insufficient. Statement II x>-y It does not tell us anything about positive y, therefore insufficient. Hence the answer is E. It should be C. See second condition Whats the OA?

I agree with C. First says, both x and y could be 0, in which case it is a NO. For +ve y, x y. Second statement by itself is not sufficient. Now, from (1), we have x = (4/9) y. From 2, we have (x+y) > 0. Put these together, and you get y>0, in which case x<y.

We can all agree that neither statements is sufficient alone, thus it comes down to C or E. 9x = 4y x > -y multiple the second equation by 9 9x > -9y 4y > -9y (substitute 9x with 4y according to 1st equation) y > 0 x > 0 (x = 4/9y and y>0) if they are both positive, x = 4/9y must be x < y. C. Hope this helps.