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

Question

Mathematics

Talia Cantu

16 February, 18:06

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

+4

Answers (2)

Know the Answer?

Kale Mercer · Answer 1

Each X and Y in the equations don't have a number in front of them so they are all considered 1.

D = 1 * (-1) - 1 * (-1) = - 1 - 1 = - 2

The answer is - 2

Jayson Cisneros · Answer 2

-2

Step-by-step explanation:

We need to set up the matrix to find the determinant

a b

c d

To find the determinant we take ad - bc

x + y = 8

x - y = 10

Take the coefficients of the x and y terms

1 1

1 - 1

1 (-1) - (1) * 1

-1 - 1

-2