PreCalculus Spring Exam Review: Matrices and Vectors

A car travels 90 meters due north. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement? (a)  

• 40 meters, South
• 50 meters, South
• 50 meters, North
• 40 meters, North

Add the matrices.

• 11  8

  -4  2

• 3  2

  -6  -6

• -3  2

  -4  -6

• 10  8

  -6  2

Tags

CCSS.HSN.VM.C.8

Subtract the matrices.

• 3 -8

  0 -1

• 3 -4

  8 -13

• -3 8

  0 1

• 3 -8

  -8 1

Tags

CCSS.HSN.VM.C.8

Find A-B

• -3 1

  7 -1

• 1 0

  1 -4

• -4 0

  6 -1

• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

Multiply

• -20 15 -10

  -30 -5 0

• -20 15 -10

  30 -5 0

• 1 8 3

  11 4 5

• 20 -15 10

  -30 5 0

Tags

CCSS.HSN.VM.C.7

Write in component form.

• <0, 4>

• <8, 2>

• <2, 8>

• <0, 2>

Tags

CCSS.5.G.A.2

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

Tags

CCSS.HSN.VM.C.6

CCSS.HSN.VM.C.8

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

• 8

• 9.01

• 6

• 1

Tags

CCSS.HSN.VM.C.6

What is the component form?

• <-5, 0>

• <0, -5>

• <0, 5>

• <5, 0>

Tags

CCSS.HSN.VM.A.2

Record the sound of your favorite animal

(the class will guess what it is)