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

 It is currently 20 Mar 2019, 00:44

### 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

# In the xy plane, does the line with equation y = 3x+2

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Director
Joined: 11 Sep 2006
Posts: 506
In the xy plane, does the line with equation y = 3x+2  [#permalink]

### Show Tags

02 Nov 2006, 20:06
In the xy plane, does the line with equation y = 3x+2 contain the point (r,s)?

1)(3r+2-s)(4r+9-s) = 0
2)(4r-6-s)(3r+2-s) = 0

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

...there ain't no such thing as a free lunch...

VP
Joined: 25 Jun 2006
Posts: 1072

### Show Tags

02 Nov 2006, 20:38
C.

if u combine them, u get 3r + 2 = s. either one alone is not Suff.
Director
Joined: 11 Sep 2006
Posts: 506

### Show Tags

03 Nov 2006, 23:43
OA was C. Don't know why that threw me - not a toughie, as such...ah well.
_________________

...there ain't no such thing as a free lunch...

Intern
Joined: 18 Oct 2006
Posts: 19

### Show Tags

04 Nov 2006, 00:04
Sorry if this is dumb or obvious, but I'm just starting out and need a little more elaboration on why they aren't sufficient alone...

thanks in advance
SVP
Joined: 01 May 2006
Posts: 1768

### Show Tags

04 Nov 2006, 03:55
1
claytont wrote:
Sorry if this is dumb or obvious, but I'm just starting out and need a little more elaboration on why they aren't sufficient alone...

thanks in advance

y = 3x+2
3x + 2 - y = 0 contain the point (r,s)?
=> 3r+2-s = 0 ? (A)

Start 1:
(3r+2-s)(4r+9-s) = 0

implies that
o 3r+2-s = 0 exactly (A)
or
o 4r+9-s = 0 : 1 point is shared with (A)

INSUFF

Start 1:
(4r-6-s)(3r+2-s) = 0

implies that
o 4r-6-s = 0 : 1 point is shared with (A)
or
o 3r+2-s = 0 exactly (A)

INSUFF

Both (1) & (2)

We have this system of equations :

o 4r+9-s = 0 or 3r+2-s = 0 (I)
AND
o 4r-6-s = 0 or 3r+2-s = 0 (II)

The "and" operand forces to look for an equation in (I) and (II) that guarantes both to be equal to 0. Hence, we have to choose 3r+2-s = 0.

SUFF.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Non-Human User
Joined: 09 Sep 2013
Posts: 10147
Re: In the xy plane, does the line with equation y = 3x+2  [#permalink]

### Show Tags

10 Mar 2019, 16:15
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: In the xy plane, does the line with equation y = 3x+2   [#permalink] 10 Mar 2019, 16:15
Display posts from previous: Sort by

# In the xy plane, does the line with equation y = 3x+2

 post reply Question banks Downloads My Bookmarks Reviews Important topics

Moderators: chetan2u, Gladiator59

 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®.