I don't know all of them but I can tell you that B and E are answers that you should check.
Answer:
-21
Step-by-step explanation:
I assume this is a 2 by 2 matrix.

determinant = -5 * 4 - 1 * 1 = -20 - 1 = -21
Four times the sum of x and two
Answer:
Multiplication is one of the four elementary mathematical operations of arithmetic, with the others being addition, subtraction and division
Step-by-step explanation: