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

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

-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

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

step-by-step explanation:

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.