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What is the value of y? (1) |x + 9| = y (2) y^2 = 9

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Bunuel
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What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   21 Apr 2021, 01:30
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What is the value of y?

(1) |x + 9| = y
(2) y^2 = 9
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C
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Bunuel
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What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   22 Apr 2021, 01:15
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What is the value of y?

(1) |x+9|=y. y is equal to the absolute value of some numbers, which implies that y must be more than or equal to 0 (\(y\geq{0}\)). That's the only thing we can deduce from this statement. Not sufficient.

(2) y^2=9 --> y = 3 or y = -3. Not sufficient.

(1)+(2) Since from (1) \(y\geq{0}\), then from (2) y = 3. Sufficient.

Answer: C.

Hope it's clear.
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Bunuel
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What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   22 Apr 2021, 01:15
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Bunuel wrote:
What is the value of y?

(1) |x + 9| = y
(2) y^2 = 9


Similar questions to practice:
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https://gmatclub.com/forum/what-is-x-85335.html
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https://gmatclub.com/forum/new-set-numb ... l#p1205398 (700+ question)

Hope this helps.
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TarunKumar1234
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Re: What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   Updated on: 21 Apr 2021, 03:49
What is the value of y?

Stat1: |x + 9| = y; although, we can say y> =0, but, we don't know about x. So, we can't get value of y. Not sufficient

Stat2: \(y^2\) = 9; y = +3, -3. Not sufficient

Combining both, y =3. Sufficient

So, I think C. :)

Originally posted by TarunKumar1234 on 21 Apr 2021, 03:01.
Last edited by TarunKumar1234 on 21 Apr 2021, 03:49, edited 1 time in total.
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Re: What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   21 Apr 2021, 03:45
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What is the value of y?

(1) |x + 9| = y
Y= any non negative number
Insufficient

(2) y^2 = 9
Y=3 or -3
Insufficient

Combining 1 and 2
Y=3
Sufficient Ans C
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Re: What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   21 Apr 2021, 06:04
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What is the value of y?

(1) |x + 9| = y
Not sufficient

(2) y^2 = 9
y can be +3 or -3

Combined Y is positive from statement 1 and y is +3

So C is the right answer
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Re: What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink] New post   25 Dec 2022, 10:59
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).

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Re: What is the value of y? (1) |x + 9| = y (2) y^2 = 9 [#permalink]
25 Dec 2022, 10:59
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