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xALIx
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If x and y are both positive, what percent of x is y? 1) 10x 15 Jun 2008, 11:34
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If x and y are both positive, what percent of x is y?
1) \(10x - 15y = 0\)
2) \(4x^2 = 9y^2\)

Please explain your answer.

btw, when I worked through the problem,using stat 2 I considered 2, -2 and 3, -3. This is wrong, can you explain why?



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altin
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If x and y are both positive, what percent of x is y? 1) 10x 15 Jun 2008, 11:51
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Answer is D you can use either statement for solution
it says both of t hem positive
x-ALI-x
If x and y are both positive, what percent of x is y?
1) \(10x - 15y = 0\)
2) \(4x^2 = 9y^2\)

Please explain your answer.

btw, when I worked through the problem,using stat 2 I considered 2, -2 and 3, -3. This is wrong, can you explain why?
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xALIx
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If x and y are both positive, what percent of x is y? 1) 10x 15 Jun 2008, 12:02
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altin
Answer is D you can use either statement for solution
it says both of t hem positive
x-ALI-x
If x and y are both positive, what percent of x is y?
1) \(10x - 15y = 0\)
2) \(4x^2 = 9y^2\)

Please explain your answer.

btw, when I worked through the problem,using stat 2 I considered 2, -2 and 3, -3. This is wrong, can you explain why?
Show more

You're right, OA = D

It says x and y are positive, but it doesn't say anything about 9 and 4, so how then do you decide not to include 2, -2, and 3, -3?
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If x and y are both positive, what percent of x is y? 1) 10x 15 Jun 2008, 17:13
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I am not sure I understand What are you asking?
it is asking for percentage
4x^2=9y^2 sqrt both side 2x=3y you don't really need to know what is x or y

x-ALI-x
altin
Answer is D you can use either statement for solution
it says both of t hem positive
x-ALI-x
If x and y are both positive, what percent of x is y?
1) \(10x - 15y = 0\)
2) \(4x^2 = 9y^2\)

Please explain your answer.

btw, when I worked through the problem,using stat 2 I considered 2, -2 and 3, -3. This is wrong, can you explain why?

You're right, OA = D

It says x and y are positive, but it doesn't say anything about 9 and 4, so how then do you decide not to include 2, -2, and 3, -3?
Show more
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gmatnub
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If x and y are both positive, what percent of x is y? 1) 10x 15 Jun 2008, 17:23
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when you squareroot a number, the answer is alway positive (in the gmat). So it is 2x = 3y
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xALIx
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If x and y are both positive, what percent of x is y? 1) 10x 17 Jun 2008, 16:42
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gmatnub
when you squareroot a number, the answer is alway positive (in the gmat). So it is 2x = 3y
Show more

Now it makes sense :-). +1



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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