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a + b

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a + b [#permalink] New post 25 Apr 2017, 02:50
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00:00

Question Stats:

68% (00:22) correct 31% (00:18) wrong based on 69 sessions


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Quantity A
Quantity B
a + b
c + d


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: a + b [#permalink] New post 08 Jun 2017, 15:30
Carcass wrote:


Image

Quantity A
Quantity B
a + b
c + d


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.


Okay, so I don't know why it is A? I thought it was D? I thought not drawn to scale is why it would be D? Can you please explain?
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Re: a + b [#permalink] New post 09 Jun 2017, 02:39
Expert's post
Since (a, b) is on the positive portion of the x-axis. a is positive and b= 0; so a + b is positive. Also, since (c, d) is on the negative portion of the axis, c is negative and d= 0; so c+d is negative. Quantity A is greater.
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Re: a + b [#permalink] New post 09 Jun 2017, 04:52
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Expert's post
Carcass wrote:


Image

Quantity A
Quantity B
a + b
c + d


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.


Let's examine each point.

(a, b)
This point is on the x-axis, which means its y-coordinate = 0
So, b = 0
Also, since the point lies to the RIGHT of the origin (0,0), its x-coordinate is POSITIVE
So, a is some POSITIVE NUMBER

(c, d)
This point is on the y-axis, which means its x-coordinate = 0
So, c = 0
Also, since the point lies BELOW the origin (0,0), its y-coordinate is NEGATIVE
So, d is some NEGATIVE NUMBER

So, we get:
Quantity A: a + b = some POSITIVE NUMBER + 0
Quantity B: c + d = some NEGATIVE NUMBER + 0

Simplify:
Quantity A: some POSITIVE NUMBER
Quantity B: some NEGATIVE NUMBER

Answer:
[Reveal] Spoiler:
A


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Re: a + b [#permalink] New post 16 Sep 2018, 22:55
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Right from diagram we say --> a,0 and 0,d (c = b = 0)

so a + b = a + 0 = 0
c + b = 0 + 0 = 0

so a> o. Qty A> Qty B
Re: a + b   [#permalink] 16 Sep 2018, 22:55
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