XII Algebra - Matrices & Determinants

If A is symmetric as well as skew-symmetric , then A is....

• Diagonal matrix

• Null matrix

• Identity Matrix

• Triangular matrix

What comes first in the order of a matrix?

• Row

• Column

If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

• 2

• 3

• 4

• AB is not defined

Tags

CCSS.HSN.VM.C.8

Matrices can be multiplied only...

• if the row of the first matrix is equal to the column of the second matrix.

• if the column of the first matrix is equal to the column of the second matrix.

• if the column of the first matrix is equal to the row of the second matrix.

• if the row of the first matrix is equal to the row of the second matrix.

Tags

CCSS.HSN.VM.C.8

What would be the dimension of the matrix product AB?

If A_1X4 and B_4X7

• 1X7

• 4X4

• 4X7

• 7X1

Tags

CCSS.HSN.VM.C.8

What do w, x, y and z equal in this matrix equation?

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

• n = p

• n = p, m =q

• m = n = p = q

• m = q

Tags

CCSS.HSN.VM.C.9

Find the inverse of the matrix.

• 
• 
• 
• Inverse doesn't exist

Tags

CCSS.HSA.REI.C.9

What is the area of triangle XYZ with vertices X(8,-6), Y(-4,2) and Z(-18,-12)?

• 280

• 140

• 180

• 240

Tags

CCSS.HSG.GPE.B.7

• O

• I₂

• -I₂

• none of these