Math Analysis Practice Test on Matrices

Name the order (dimensions) of this matrix.

• 6 x 2

• 2 x 6

• 5 x 2

• 2 x 5

• 2 x 7

Dimensions?

• a

• b

• c

• d

The number 6 is located in a certain row and column. Identify the correct representation of that number in this matrix.

• a₃₁

• a₁₃

• a₃₂

• a₁₂

• a₂₃

What is a matrix?

• A type of coordinate plane.

• A array of numbers arranged in rows and columns.

• A movie made in the year 2000 starring Val Kilmer and Samuel Jackson and grossed over $550 million at the box office.

• A scalar such as a determinant.

• A unique polygon that has an area identical to its perimeter.

According to our class notes, the determinant is equal to...

• ab - cd

• ad - bc

• ac - bd

• ad + bc

• ab + cd

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 # of columns of the 1st must equal the # of rows of the 2nd.

• Both matrices must have inverses

Tags

CCSS.HSN.VM.C.8

Solve the system using matrices as discussed in class. Show all of your steps on separate paper, so that no other method was attempted.

-5x + 5y = -10

-7x + 4y = 13

• (-7, -5)

• (-7, -9)

• (7, -9)

• (-7, 5)

Tags

CCSS.HSA.REI.C.9

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

find: the product BA

(please disregard the decimal points in the answers)

• 47.. 30

  9. .. 5

• 17.. 15

  42.. 35

• 10.. 25

  7... 1

• not possible because they are not compatible

• 17 30

  47.. 5

Tags

CCSS.HSN.VM.C.8

Add

• 11 8

  -4 2

• 3 2

  -6 -6

• -3 2

  -4 -6

• 10 8

  -6 2

Tags

CCSS.HSN.VM.C.8