PreCalc Test Review Matrices - 1

Perform the indicated operation.  If it’s not possible, select Not Possible. 

• 7
  -7
  -6
  20
• 7 
  -9
  -6
  20
• Not Possible
• 7
  -9
  2
  20

What is the value of element a₂₃?

Find 3B - 2A

• [22 25]

  [17 3]

• [14 5]

  [-11 3]

• [-14 5]

  [11 -3]

• none of these

Perform the scalar multiplication. 

​ (a)   ​ (b)  

​ (c)   ​ (d)  

• -1
• 3
• 9
• -16
• -2
• 36
• 6
• -64
• -4
• -12

Match each matrix to its correct dimension.

• 2 x 4

• 
• 4 x 2

• 
• 3 x 1

• 
• 2 x 3

• 
• 1 x 3

• 

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3

Find the product of the two matrices.

• undefined
• -3   16
  17   12
  8   -10
• 3   12 
  -15  -8
  -1   -3

Calculate the determinant

• 0
• -15
• -70
• 10

Calculate the determinant

• 13
• -3
• -5
• 13

When a 3x6 matrix is multiplied by a 6x5 matrix, what will the dimensions of the product be?

• 6x6
• 3x6
• 3x5
• 5x6