1. 
For this matrix, the following is true: > e_{11} = 2

2. 
For these equations, the following is true: 3x – 4y = 2 x + 2y = 5 >

3. 
For this matrix, find the determinant: > 12

4. 
For these equations: x + 2y = 6 3x – y = 2 Which of these is equivalent: >

5. 
What is the formula to find the determinant of a 2 × 2 matrix? > ad – cb
