bad. don't know how to matries in precalculus
Question
Updated 4/24/2014 11:10:35 PM
This conversation has been flagged as incorrect.
Flagged by yeswey [4/24/2014 11:10:35 PM]
Original conversation
User: bad. don't know how to matries in precalculus

Weegy: whats your problem with the subject?
Greenpepper|Points 2479|

User: solve the system of equaton x+y-2x=4 ,2x-3y+3x=5 ,3x+3y+7z=14

Question
Updated 4/24/2014 11:10:35 PM
This conversation has been flagged as incorrect.
Flagged by yeswey [4/24/2014 11:10:35 PM]
Rating
3
x + y - 2x = 4 can be simplified to be -x + y = 4, so y = x + 4
2x - 3y + 3x = 5 can be simplified to be 5x - 3y = 5 (equation 1)
3x + 3y + 7z = 14 (equation 2)
Replace y in the equation 2 we have:
5x - 3(x + 4) = 5
5x - 3x - 12 = 5
2x = 17
x = 17/2
y = 17/2 + 4 = 25/2
replace x, y in the equation 2,
3(17/2) + 3(25/2) + 7z = 14
51/2 + 75/2 + 7z = 14
7z = 14 - 126/2 = 14 - 63 = -49
z = -49/7 = -7
The solution for the system of equaton x+y-2x=4 ,2x-3y+3x=5 ,3x+3y+7z=14 is x = 17/2, y = 25/2, z = -7
Confirmed by andrewpallarca [4/25/2014 12:38:29 PM]

27,189,081
*
Get answers from Weegy and a team of really smart live experts.
Popular Conversations
What is Amendments III?
Weegy: The First Amendment prohibits the making of any law respecting an establishment of religion, impeding the free ...
15. What is 26% as a fraction in simplest form?
Weegy: 22% as a fraction in the simplest form is 11/50.
Which of the following is an example of an improper fraction? A. ...
Weegy: 3 3/5 as an improper fraction is 18/5. User: If three bags of birdseed cost \$14.16, how much will 14 bags ...
For a pair of similar triangles, corresponding sides are always ...
Weegy: For a pair of similar triangles, corresponding sides are sometimes congruent.
You are seated in the driver's seat of your parked car, preparing to ...
Weegy: You are seated in the driver's seat of your parked car, preparing to drive. You must properly fasten your seat ...
What is 5.25% of 200
Weegy: 200*3/5 = 120. User: A certain alloy contains 5.25% copper. How much copper is there in a piece weighing 200 ...
S
L
P
P
Points 100 [Total 554] Ratings 0 Comments 100 Invitations 0 Offline
S
L
R
P
R
P
R
Points 94 [Total 554] Ratings 0 Comments 4 Invitations 9 Online
S
R
L
R
P
R
P
R
R
R
Points 43 [Total 865] Ratings 0 Comments 3 Invitations 4 Offline
S
Points 41 [Total 41] Ratings 0 Comments 11 Invitations 3 Offline
S
Points 16 [Total 33] Ratings 0 Comments 16 Invitations 0 Offline
S
Points 12 [Total 12] Ratings 0 Comments 12 Invitations 0 Offline
S
Points 10 [Total 40] Ratings 1 Comments 0 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
Points 1 [Total 1] Ratings 0 Comments 1 Invitations 0 Offline
S
Points 1 [Total 2] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.