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

 It is currently 22 Jan 2019, 22:13

### 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

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

## Events & Promotions

###### Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### The winners of the GMAT game show

January 22, 2019

January 22, 2019

10:00 PM PST

11:00 PM PST

In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.
• ### Key Strategies to Master GMAT SC

January 26, 2019

January 26, 2019

07:00 AM PST

09:00 AM PST

Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

# If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 52392
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is  [#permalink]

### Show Tags

15 Feb 2017, 02:27
00:00

Difficulty:

25% (medium)

Question Stats:

79% (00:52) correct 21% (00:51) wrong based on 50 sessions

### HideShow timer Statistics

If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is the value of y?

A. −12
B. −3
C. 3
D. 6
E. 12

_________________
Manager
Joined: 13 Apr 2010
Posts: 89
Re: If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is  [#permalink]

### Show Tags

15 Feb 2017, 02:54
Bunuel wrote:
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is the value of y?

A. −12
B. −3
C. 3
D. 6
E. 12

Substitute x = 9 in the Quadratic equation .
81 - 9y + 27 = 0
y = 108/9
y = 12

Senior Manager
Joined: 19 Apr 2016
Posts: 274
Location: India
GMAT 1: 570 Q48 V22
GMAT 2: 640 Q49 V28
GPA: 3.5
WE: Web Development (Computer Software)
Re: If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is  [#permalink]

### Show Tags

15 Feb 2017, 03:04
Bunuel wrote:
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is the value of y?

A. −12
B. −3
C. 3
D. 6
E. 12

x^2 − yx + 27 = 0
If x = 9
81-9y+27=0
9y=108
y=12

Hence Option E is correct
Hit Kudos if you liked it .
Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4353
Location: India
GPA: 3.5
Re: If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is  [#permalink]

### Show Tags

15 Feb 2017, 07:23
Bunuel wrote:
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is the value of y?

A. −12
B. −3
C. 3
D. 6
E. 12

Plug in the value of x = 9 and check -

$$9^2 − 9y + 27 = 0$$

Or, $$9y = 108$$

So, y = 12

Hence, correct answer must be (E) $$y = 12$$
_________________

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 )

VP
Joined: 07 Dec 2014
Posts: 1153
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is  [#permalink]

### Show Tags

15 Feb 2017, 15:10
Bunuel wrote:
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is the value of y?

A. −12
B. −3
C. 3
D. 6
E. 12

we know 27 is a multiple of 9
27/9=3
we know signs of both numbers are negative
(x-9)(x-3)=x^2-12x+27=0
y=12
If x = 9 is one solution to the quadratic x^2 − yx + 27 = 0, what is &nbs [#permalink] 15 Feb 2017, 15:10
Display posts from previous: Sort by