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{2x - y = -1 {x + 3y = -11 (Use subscription.)
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Asked 12/18/2014 8:37:04 PM
Updated 12/25/2014 12:19:35 AM
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Flagged by janezeshun [12/25/2014 12:15:32 AM]
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User: {2x - y = -1

User: {2x - y = -1 {x + 3y = -11 (Use subscription.)

Weegy: 2x - 3y = 1,y = x -1 is equal to x = 2, y = 1.
emdjay23|Points 20824|

User: what is the overall average of 90, 90, 90, 90, 82, and 82

Question
Asked 12/18/2014 8:37:04 PM
Updated 12/25/2014 12:19:35 AM
2 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by janezeshun [12/25/2014 12:15:32 AM]
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2x - y = -1 , y = 2x + 1
x + 3y = -11
x + 3(2x + 1) = -11
x + 6x + 3 = -11
7x = -14
x = -2
y = 2*(-2) + 1
y = -3
So the solution for 2x - y = -1 , y = 2x + 1 is x = -2, y = -3 .
Added 12/25/2014 12:15:25 AM
This answer has been confirmed as correct and helpful.
Confirmed by sujaysen [12/25/2014 1:15:55 PM]
3
The overall average of 90, 90, 90, 90, 82, and 82 is 87 1/3.
average = (90*4 + 82 + 82)/6 = 524/6 = 87 1/3.

Added 12/25/2014 12:19:35 AM
This answer has been confirmed as correct and helpful.
Confirmed by sujaysen [12/25/2014 1:17:25 PM]
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Confirmed by jeifunk [12/17/2014 8:22:07 AM]
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Added 1/10/2015 2:04:08 PM
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Confirmed by andrewpallarca [1/10/2015 2:08:03 PM]
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Updated 12/18/2014 8:46:00 PM
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Added 12/18/2014 8:46:00 PM
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