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What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11

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What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   11 Dec 2008, 15:33
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What is the value of y?

(1) 3|x^2 – 4| = y – 2
(2) |3 – y| = 11



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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   11 Dec 2008, 17:37
C
stmt1 : what is x ? - In Suff
stmt2: y could be -8 or 14 - In Suff

Together

3|x^2 - 4| can't be negative, so y = 14 - Suff
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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   11 Dec 2008, 21:37
even i got this one wrong on mgmat..

and its soo simple..

hey what do you think about mgmat math cat ? do you think they are representitive of the real gmat?
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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   11 Dec 2008, 23:54
Can it be A

3|x^2 – 4| = y – 2 can be written as

3(x^2 – 4) = y – 2 ---------(1)
3(x^2 – 4) = -y + 2 --------(2)

from 1 and 2,

y == 2.

Stm2: y could be -8 or 14 - In Suff

please advice if i am wrong
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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   12 Dec 2008, 15:25
fresinha12 wrote:
even i got this one wrong on mgmat..

and its soo simple..

hey what do you think about mgmat math cat ? do you think they are representitive of the real gmat?


I havn't given all the MGMAT tests yet. I am planning to do that next week.
Has anyone got any insight into this ? I am curious to know too...
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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post   12 Dec 2008, 23:20
selvae wrote:
Can it be A

3|x^2 – 4| = y – 2 can be written as

3(x^2 – 4) = y – 2 ---------(1)
3(x^2 – 4) = -y + 2 --------(2)

from 1 and 2,

y == 2.

Stm2: y could be -8 or 14 - In Suff

please advice if i am wrong



Here equating the two equations will not help as these two equations are for two different conditions.

If you look at stmt1, left side is >=0. Hence, for the right side to be >=0, y >=2 and there is no single value of y. Hence, stmt1 is insufficient.



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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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Re: What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink]
12 Dec 2008, 23:20
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