GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 23 Sep 2018, 05:24

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.

Close

Request Expert Reply

Confirm Cancel

If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49320
If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =  [#permalink]

Show Tags

New post 04 Feb 2018, 21:37
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

88% (00:34) correct 12% (00:25) wrong based on 60 sessions

HideShow timer Statistics

Senior Manager
Senior Manager
User avatar
G
Joined: 17 Oct 2016
Posts: 323
Location: India
Concentration: Operations, Strategy
GPA: 3.73
WE: Design (Real Estate)
GMAT ToolKit User Premium Member
Re: If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =  [#permalink]

Show Tags

New post 04 Feb 2018, 21:44
A

(x-y)²/(x²-y²)=9

(x-y)(x-y)/(x+y)(x-y)=9

(x-y)/(x+y)=9

Inverse of it,

(x+y)/(x-y)=1/9
_________________

Help with kudos if u found the post useful. Thanks

VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1264
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member Reviews Badge CAT Tests
Re: If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =  [#permalink]

Show Tags

New post 19 Mar 2018, 09:40
Bunuel wrote:
If \(\frac{(x - y)^2}{x^2 - y^2} = 9\), then \(\frac{x + y}{x - y} =\)

(A) 1/9
(B) 1/3
(C) 1
(D) 3
(E) 9


\(\frac{(x - y)^2}{x^2-y^2}\) \(= 9\)

\(\frac{(x-y)(x-y)}{(x-y)(x+y)}\) \(= 9\)

\(\frac{(x-y)}{(x+y)}\) \(= 9\)

Therefore, \(\frac{x + y}{x - y}\)\(=\)\(\frac{1}{9}\)

(A)
_________________

"Do not watch clock; Do what it does. KEEP GOING."

Board of Directors
User avatar
P
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4033
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User Premium Member
Re: If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =  [#permalink]

Show Tags

New post 19 Mar 2018, 09:49
Bunuel wrote:
If \(\frac{(x - y)^2}{x^2 - y^2} = 9\), then \(\frac{x + y}{x - y} =\)

(A) 1/9
(B) 1/3
(C) 1
(D) 3
(E) 9


\(\frac{(x - y)^2}{x^2 - y^2} = 9\)

Or, \(\frac{(x - y)(x - y)}{(x + y)(x - y)} = 9\)

Or, \(\frac{(x - y)}{(x + y)} = 9\)

So, \(\frac{x + y}{x - y} =\frac{1}{9}\), Answer must be (A)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

GMAT Club Bot
Re: If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) = &nbs [#permalink] 19 Mar 2018, 09:49
Display posts from previous: Sort by

If (x - y)^2/(x^2 - y^2) = 9, then (x + y)/(x - y) =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


cron
Copyright

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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.