Answer:
-21
Step-by-step explanation:
I assume this is a 2 by 2 matrix.

determinant = -5 * 4 - 1 * 1 = -20 - 1 = -21
Answ(0,2)
By putting x 0 and y 2
Step-by-step explanation:
Answer:
Perpendicular
Step-by-step explanation:
Perpendicular lines meet at a 90 degree angle.
Answer:
3
Step-by-step explanation:
it will be 3 if you want to find the positive number
0.4 because if it’s five or more, add one more. If it’s four or less, let it rest.