Question

MEDEL!!!
2x - y = 5
x + 3y = 7

What is the value of the system determinant?

Answer 1

you can solve this using elimination or substitution; does the problem specify which one you should use?

Answer 2

multiply second equation with 2 and solve it

Answer 3

x terms will be cancelled

Answer 4

that would be elimination @rathanreddy

Answer 5

2x=6y=14 is what is would become

Answer 6

k sorry i ddn't see it

Answer 7

and actually @rathanreddy that is incorrect b/a it should be -2 to eliminate the other

Answer 8

he is looking for the determinant....this is not a square matrix....I do not know how to make your equations into a square matrix in order to find the determinant.

Answer 9

ya when we solve we can change the signs

Answer 10

@Jamierox4ev3r

Answer 11

it has to be square, doesn't it....this is a 2x3 matrix....if it was a 2x2 or a 3x3 you could find the determinant...

Answer 12

You can use substitution or elimination

Answer 13

wait...are you solving for the system of equations or are you looking for the determinant ?

Answer 14

then use the way i told above you will get x and y

Answer 15

in this one the determinant

Answer 16

then you cant solve by elimination you should use determinant

Answer 17

I do not believe you can solve for the determinant if the matrix is not square...you have a 2x3 matrix...it is not square

Answer 18

@skullpatrol ....please take a look at this

Answer 19

@timo86m ...help

Answer 20

@johnweldon1993 ..help

Answer 21

determinant = 2(3) - (-1)(1) = 6+1=7

Answer 22

am i right?

Answer 23

I am not sure

Answer 24

@kropot72 ...please take a look at this

Answer 25

@satellite73 ....we need your assistance

Answer 26

@satellite73

Answer 27

Hmm from what I can remember about linear equations and determinants....there are both an 'x' and a 'y' determinant....are you sure the question doesn't specify for either one?

Answer 28

Or there is just a coefficient determinant...I'm not sure which you need...if you need the coefficient determinant...than @DontLikeMathButOhWell would be correct here...

Answer 29

By any chance zachary, is this multiple choice ?....lol

Answer 30

7
9
22

Answer 31

you might want to go with @DontLikeMathButOhWell ....go with 7

Answer 32

Yeah the 7 would look correct to me too lol

Answer 33

thanks john for coming and looking....good job Dontlikemath

Answer 34

Yay :D, I feel accomplished

Answer 35

Lol good job @DontLikeMathButOhWell

And no problem @texaschic101 :)