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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Re: What is the value of y-x^2-x? [#permalink]
06 Jan 2013, 07:55

4

This post received KUDOS

We need to find whether info is sufficient to find value of y-x2-x.

We cant simplify the question stem further, so lets start with st1: (1) y = -3x --> two vars 1 eq--> cant solve (2) y = -4(x + 1) --> two vars 1 eq--> cant solve

1+2 together is solvable. y=-3x and also y=-4x-4

so -3x=-4x-4 x=-4, y=12 we dont actually need to solve but for illustration i did. Knowing that we can solve them to get unique values of x and y is enough.

Re: What is the value of y-x^2-x? [#permalink]
18 Jul 2013, 13:17

Can someone please give a more in depth explanation to this. I would also appreciate if the question was \(using markup\) because the expression in the question above is rather ambiguous.

Re: What is the value of y-x^2-x? [#permalink]
18 Jul 2013, 13:24

1

This post received KUDOS

Expert's post

aeglorre wrote:

Can someone please give a more in depth explanation to this. I would also appreciate if the question was \(using markup\) because the expression in the question above is rather ambiguous.

What is the value of \(y-x^2-x\)?

(1) y = -3x --> the question becomes: what is the value of \(-3x-x^2-x\). We need the value of x to answer this question. Not sufficient.

(2) y = -4(x + 1) --> the question becomes: what is the value of \(-4(x + 1)-x^2-x\). We need the value of x to answer this question. Not sufficient.

(1)+(2) We have two distinct linear equations: \(y = -3x\) and \(y = -4(x + 1)\), thus we can solve for both variables and get the value of \(y-x^2-x\). Sufficient.

Re: What is the value of y-x^2-x? [#permalink]
25 Oct 2013, 01:04

Expert's post

Raihanuddin wrote:

The explanation about linear equation is not clear

If you have n distinct linear equations and n variables then you can solve for them. "Distinct linear equations" means that no equation can be derived with the help of others or by arithmetic operation (by multiplication, addition, ...).

We have two distinct linear equations: \(y = -3x\) and \(y = -4(x + 1)\). Solving gives: x=-4 and y=12.

Re: What is the value of y-x^2-x? [#permalink]
21 May 2015, 02:41

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: What is the value of y-x^2-x? [#permalink]
23 May 2015, 23:03

Bunuel wrote:

aeglorre wrote:

Can someone please give a more in depth explanation to this. I would also appreciate if the question was \(using markup\) because the expression in the question above is rather ambiguous.

What is the value of \(y-x^2-x\)?

(1) y = -3x --> the question becomes: what is the value of \(-3x-x^2-x\). We need the value of x to answer this question. Not sufficient.

(2) y = -4(x + 1) --> the question becomes: what is the value of \(-4(x + 1)-x^2-x\). We need the value of x to answer this question. Not sufficient.

(1)+(2) We have two distinct linear equations: \(y = -3x\) and \(y = -4(x + 1)\), thus we can solve for both variables and get the value of \(y-x^2-x\). Sufficient.

Answer: C.

Hope it's clear.

Does this question belongs to the 700 level category? Seems pretty straightforward for a 700 leveler...

Re: What is the value of y-x^2-x? [#permalink]
24 May 2015, 05:56

Expert's post

dhruvmadra wrote:

Bunuel wrote:

aeglorre wrote:

Can someone please give a more in depth explanation to this. I would also appreciate if the question was \(using markup\) because the expression in the question above is rather ambiguous.

What is the value of \(y-x^2-x\)?

(1) y = -3x --> the question becomes: what is the value of \(-3x-x^2-x\). We need the value of x to answer this question. Not sufficient.

(2) y = -4(x + 1) --> the question becomes: what is the value of \(-4(x + 1)-x^2-x\). We need the value of x to answer this question. Not sufficient.

(1)+(2) We have two distinct linear equations: \(y = -3x\) and \(y = -4(x + 1)\), thus we can solve for both variables and get the value of \(y-x^2-x\). Sufficient.

Answer: C.

Hope it's clear.

Does this question belongs to the 700 level category? Seems pretty straightforward for a 700 leveler...

The difficulty level is based on user attempts on this question. Check the stats in the original post. _________________

Re: What is the value of y-x^2-x? [#permalink]
24 May 2015, 09:47

Expert's post

Hi dhruvmadra,

As you study, you're going to find that what you think is "hard" is not necessarily what the Test Makers 'define' as "hard" (and vice-versa). It's not practical to spend time trying to assess the difficulty level of any individual question. Since your goal is almost certainly to increase your scores, you should look at the types of questions that you're getting wrong and WHY you're getting them wrong. If you get a question wrong that you SHOULD have gotten correct (but you made a silly/little mistake), then I don't care what 'level' of question it is - you've got to work to keep those mistakes from happening (since too many little mistakes will kill your scores).

On September 6, 2015, I started my MBA journey at London Business School. I took some pictures on my way from the airport to school, and uploaded them on...

When I was growing up, I read a story about a piccolo player. A master orchestra conductor came to town and he decided to practice with the largest orchestra...

I’ll start off with a quote from another blog post I’ve written : “not all great communicators are great leaders, but all great leaders are great communicators.” Being...