# Matrices: Basic (Matrix) Instinct Quiz

Think you’ve got your head wrapped around

*? Put your knowledge to the test. Good luck — the Stickman is counting on you!***Matrices**Q.

For this matrix, the following is true:

e

_{11}= 2This is a 2 × 2 matrix.

Column two is 3, 0.

The determinant is 3.

All of the above

Q. What's the coefficient matrix for the following system of equations?

3*x* – 4*y* = 2

x + 2*y* = 5

All of the above.

None of the above.

Q. For this matrix, find the determinant:

-16

9

12

6

None of the above

Q. What is the formula to find the determinant of a 2 × 2 matrix?

*ab – cd*

*ad – cb*

*ad*+

*cb*

*ab*+

*cd*

None of the above