Find all School-related info fast with the new School-Specific MBA Forum

It is currently 26 Jul 2014, 11:29

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the value of y? 1. 3|x^2-4|= y-2 2. |3-y|=11 How

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 563
Location: United Kingdom
Concentration: International Business, Strategy
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 12

Kudos [?]: 274 [0], given: 217

GMAT Tests User
What is the value of y? 1. 3|x^2-4|= y-2 2. |3-y|=11 How [#permalink] New post 02 Nov 2011, 12:11
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

33% (00:00) correct 67% (02:06) wrong based on 3 sessions
What is the value of y?

1. 3|x^2-4|= y-2
2. |3-y|=11


How come C? Any ideas guys please? I understand A & B are insufficient on their own.
[Reveal] Spoiler: OA

_________________

Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610 :-(

1 KUDOS received
Intern
Intern
avatar
Joined: 01 May 2011
Posts: 10
Followers: 0

Kudos [?]: 1 [1] , given: 1

Re: DS - Algebra [#permalink] New post 02 Nov 2011, 13:37
1
This post received
KUDOS
from 2nd we got 2 roots: -8 or 14, check this roots with 1st statement we see that 3|x^2-4| can't be negative, so -8 is out. 14 is left and it's the only choice left.
Director
Director
avatar
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 563
Location: United Kingdom
Concentration: International Business, Strategy
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 12

Kudos [?]: 274 [0], given: 217

GMAT Tests User
Re: DS - Algebra [#permalink] New post 02 Nov 2011, 14:03
Thanks aaaqqq222. Much appreciated.
_________________

Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610 :-(

Senior Manager
Senior Manager
avatar
Joined: 18 Sep 2009
Posts: 374
Followers: 3

Kudos [?]: 45 [0], given: 2

GMAT Tests User
Re: DS - Algebra [#permalink] New post 03 Nov 2011, 08:35
can somebody explain the question in detail. I understand the stmnt(2).
I solved stmnt (i) like this

3(x.x-4)=y-2
3x.x -12 =y-2
y=3x.x -10

by assigining "-" to absolute value

-3x.x +14=y
when equal 2 equations
14=-10.
Manager
Manager
avatar
Joined: 06 Feb 2011
Posts: 84
GMAT 1: Q V
GMAT 2: Q V
GMAT 3: Q V
WE: Information Technology (Computer Software)
Followers: 0

Kudos [?]: 6 [0], given: 11

GMAT Tests User
Re: DS - Algebra [#permalink] New post 03 Nov 2011, 11:20
Here is my take, can the experts confirm please if my approach is correct ?

1. 3|x^2-4|= y-2 gives us 2 values if we open the modulus, for the 2 values y = 3x^2 -10 and y = 14 – 3x^2. NOT SUFFICIENT.

2. |3-y|=11, gives y = -8, 14 if we open the modulus. NOT SUFFICIENT.

Combining 1 and 2. if we put the values y = -8, 14 in 3|x^2-4|= y-2,
If y = -8, 3|x^2-4|= -10, not possible as
If y = 14, 3|x^2-4|= 12, Only possible value.

Hence Ans is C.
Re: DS - Algebra   [#permalink] 03 Nov 2011, 11:20
    Similar topics Author Replies Last post
Similar
Topics:
What is the value of y? (1) 3|(x^2) 4|=y 2 (2) |(3 y)|=11 I3igDmsu 4 20 Jul 2009, 03:35
What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 prasun84 2 05 Dec 2008, 07:02
What is the value of y? (1) 3|x2 4| = y 2 (2) |3 y| = 11 judokan 2 25 Jul 2008, 23:47
Experts publish their posts in the topic What is the value of y? (1) 3|(x^2) 4| = y 2 (2) |3 y| = 11 jimmyjamesdonkey 15 24 Jul 2008, 14:47
What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 sujayb 2 22 Nov 2006, 12:29
Display posts from previous: Sort by

What is the value of y? 1. 3|x^2-4|= y-2 2. |3-y|=11 How

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.