Question

True or false?

Answer 1

@freckles

Answer 2

srry can't

Answer 3

thats ok

Answer 4

@Icedragon50

Answer 5

:)

Answer 6

that matrix they give you means that z = 5 and y = 2

use those values to find x

Answer 7

7? @jim_thompson5910

Answer 8

i mean -2 @jim_thompson5910

Answer 9

in case you're not sure how I got the values for y and z

Answer 10

incorrect on both

Answer 11

x - 2y + z = -2

x - 2(2) + 5 = -2

x - 4 + 5 = -2

x + 1 = -2

x = ??

Answer 12

oh, -3?

Answer 13

yes

Answer 14

x = -3
y = 2
z = 5

Answer 15

that is the possible solution; however, you need to check it in each equation to make sure it's a true solution

Answer 16

oh ok

Answer 17

the method is correct but the values am not sure of them for both 2 and 3 row

Answer 18

oh ok

Answer 19

it is False
it should be
1 -2 1 -2
0 1 0 6
0 0 1 3

Answer 20

this is the elimination method
multiply 1 row by a number so you can eliminate x in the 2 row and the same for thr 3 row

Answer 21

(7,6,3)

Answer 22

@jim_thompson5910

Answer 23

x-2y+z = -2

7-2(6)+3 = -2 ... plug in (x,y,z) = (7,6,3)

7-12+3 = -2

-2 = -2 ... equation is true

Answer 24

I checked the first equation and I'll let you check the other equations

Answer 25

all 3 equations must be true when you plug in the possible solution of (x,y,z) = (7,6,3)

Answer 26

i checked them and there right

Answer 27

yes all three are true when (x,y,z) = (7,6,3)

Answer 28

so this problem is true then?

Answer 29

if i got all of them right?

Answer 30

no, as AJ01 said above, it's false because of that matrix change

Answer 31

the original matrix given to you leads to a false solution (so it can't be the proper matrix)

Answer 32

ohhhh ok i see