I hate this one: In the rectangular coordinate system, are : DS Archive
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# I hate this one: In the rectangular coordinate system, are

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I hate this one: In the rectangular coordinate system, are [#permalink]

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08 Aug 2009, 06:55
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Question Stats:

100% (01:02) correct 0% (00:00) wrong based on 2 sessions

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I hate this one:

In the rectangular coordinate system, are the points (r,s) and (u,v) equidistant from the origin?

A) r+s=1
B) u=1-r; v=1-s
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Re: equidistant from the origin [#permalink]

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08 Aug 2009, 08:16
noboru wrote:
I hate this one:

In the rectangular coordinate system, are the points (r,s) and (u,v) equidistant from the origin?

A) r+s=1
B) u=1-r; v=1-s

is: s^2+r^2 = u^2+v^2

from 1

no relation between the 2 points cooridnates...insuff

from 2

s^2+r^2 = (1-r)^2+(1-s)^2 = 1-2r+r^2+1-2s+s^2

2 = 2r+2s ie: r+s = 1 same as A ...insuff

both inusff as well ............E
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Re: equidistant from the origin [#permalink]

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10 Aug 2009, 03:54
whats the OA ...

can it be C!
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Re: equidistant from the origin [#permalink]

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10 Aug 2009, 04:12
Agree with AshForGmat
From 1:
=> Insuff
From 2:
It's possible that
u= 0.9, r=0.1
v=0.8, s= 0.2
=>Insuff
(1)&(2) together: u=s & v=r => Suff => (C)
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Re: equidistant from the origin [#permalink]

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04 Sep 2009, 09:20
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Re: equidistant from the origin [#permalink]

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04 Sep 2009, 11:58
Re: equidistant from the origin   [#permalink] 04 Sep 2009, 11:58
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