Matrix Determinants and Cramer's Rule

If A is an invertible matrix of order 3 and |A|=5 then find |Adj A|

• 5

• 15

• 25

• 125

• 2 and 1

• -2 and -1

• 2 and -1

• 3 and 4

If A is any invertible matrix then A is

• square matrix

• non singular matrix

• both

• none of these

Evaluate the determinant of the matrix.

• -21

• 0

• 9

• 12

What is the determinant of this matrix?

• 5

• -5

• 0

• -12

Solve the system of equations using Cramer's Rule.

• A
• B
• C
• D

If the determinant of the matrix is -4, what is the value of x?

Evaluate the determinant of the matrix.

• 2

• 6

• 0

• -2