+A2 - Matrices Test Review

In Matrix R (pictured) what element is in the second row, third column?

• 8
• 9.01
• 6
• 1

Tags

CCSS.5.NBT.A.3

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

Tags

CCSS.3.OA.A.3

What must be true in order to ADD two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant can't equal 0.
• The column of the 1st must equal the row of the 2nd.

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Tags

CCSS.HSN.VM.C.8

Subtract

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

Tags

CCSS.HSN.VM.C.10

CCSS.HSN.VM.C.8

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

• 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

Tags

CCSS.HSA.CED.A.3

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

• x=-1
  y=2
  z=-2
• x=2
  y=1
  z=-1
• x=-2
  y=-1
  z=-2
• x=2
  y=2
  z=-1

Find the area of ΔABC formed by the points: A(-5,-3), B(1,6), C(3,-1).

• 60
• -60
• 30
• -30

• A
• B
• C
• D