Question

v

Answer 1

@texaschic101 @sweetburger

Answer 2

@thomaster @thomaster

Answer 3

@DW101796

Answer 4

ok...if x is isolated in the second equation..
x - 4y + 3z = -11
x = 4y - 3z - 11

now sub this into the first equation
2x - 3y - z = -1
2(4y - 3z - 11) - 3y - z = -1
8y - 6z - 22 - 3y - z = -1
5y -7z = 21

now sub it into the third equation
2x + 9y + 3z = -13
2(4y - 3z - 11) + 9y + 3z = -13
8y - 6z - 22 + 9y + 3z = -13
17y - 3z = 9

answer is : 2nd one

Answer 5

thats what I got too!!

Answer 6

can you help me with this

Answer 7

good to hear :) Great minds think alike

Answer 8

you need more help ?

Answer 9

3x - 5y + 2z = 7
4x + 9y - z = 2 --->(2)
---------------
3x - 5y + 2z = 7
8x + 18y - 2z = 4 (result of multiplying by 2)
--------------add
11x + 13y = 11

4x + 9y - z = 2 -->(3)
x - 3y + 3z = 7
--------------
12x + 27y - 3z = 6 (result of multiplying by 3)
x - 3y + 3z = 7
---------------add
13x + 24y = 13

answer is : 1st one

Answer 10

yayy I think i get this now!!

Answer 11

for that one all of them seemed right except D, but I picked the easiest one for me that took to solve :/

Answer 12

I have to go with C as well :)

Answer 13

alright! thx

Answer 14

I am sorry I just want to make sure