## 96smidge Group Title Given the system of equations, what is the value of the system determinant? x + y = 8 x - y = 10 one year ago one year ago

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1. fewscrewsmissing Group Title

To find the determinant of a 2x2 matrix: $A = \left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\\ |A|=det(A)=ad-cb$

2. fewscrewsmissing Group Title

I'd actually forgotten how to do this since it's been so long, and it literally took a 2 second Google search ;)

3. jedai17 Group Title

a and c is the value of x and b and d is the value of y

4. jedai17 Group Title

|dw:1361514044728:dw|

5. jedai17 Group Title

then find the determinant according to the formula given by @fewscrewsmissing