What is the value of y? (1) 3|(x^2) 4|=y 2 (2) |(3 y)|=11 : DS Archive
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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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Manager
Joined: 25 May 2009
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Concentration: Finance
GMAT Date: 12-16-2011
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What is the value of y? (1) 3|(x^2) 4|=y 2 (2) |(3 y)|=11 [#permalink]

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20 Jul 2009, 03:35
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What is the value of y?

(1) 3|(x^2)–4|=y–2

(2) |(3–y)|=11

[Reveal] Spoiler:
OA=C, can someone please explain why A is not sufficient by showing work. Thanks
Senior Manager
Joined: 23 Jun 2009
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Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
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Kudos [?]: 130 [0], given: 80

Re: Value of y? [#permalink]

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20 Jul 2009, 05:03
C.
1st statement says that y is positive. But can't see its value.
2nd statement says that absolute value of (3-y) is 11; but we do not know either y is positive or negative.
By taking both together we can find y's value.
Senior Manager
Joined: 23 Jun 2009
Posts: 361
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 130 [0], given: 80

Re: Value of y? [#permalink]

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20 Jul 2009, 05:08
A is insuff because we do not know x
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Re: Value of y? [#permalink]

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20 Jul 2009, 06:34
Can someone explain me how both statements together is sufficient..
Senior Manager
Joined: 23 Jun 2009
Posts: 361
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 130 [0], given: 80

Re: Value of y? [#permalink]

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20 Jul 2009, 11:06
1st statement says that y is positive.
Since y is positive absolute value of (3-y) => y-3 =11 it can not be (3-y) becauseif 3-y=11; y becomes -8; but we know that y is positive.
Re: Value of y?   [#permalink] 20 Jul 2009, 11:06
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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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