Question

Given the system of equations, what is the value of the system determinant?
x + y = 8
x - y = 10
0
-1
-2

Answer 1

\[\left|\begin{array} \\1 & 1 \\ 1 & -1 \\ \end{array}\right|=(1\times-1)-1\times1=-1-1=-2\]

Answer 2

-1

Answer 3

/?

Answer 4

?

Answer 5

how did you get -1

Answer 6

ya

Answer 7

how

Answer 8

times

Answer 9

\[\left[\begin{matrix}a & b \\ c& d\end{matrix}\right]\] = a.d - b.c

Answer 10

ITS 1