Goal 3.01/3.02
Operations and
Interpretations of Matrices
Matrices Basics: Dimensions
Dimensions: Rows by Columns
What are the dimensions of the following
matrices?
2
0 4

 3 4 3 8 


2
1
7
0



11 4 1 7

1


4 0 9


2 7 9
If matrix M equals matrix N,
find the values of a, b, c.
M  a  1 2b 3  c 
N  0 5 4

Use the following matrices to perform
the necessary operations.
3 7 


A  0 2

8 5 

2B  C

4 8


B  6 9 

1 0

3 5


C  3 6 

0 7 


2
D
3 

6
 
D  3

0

Use the following matrices to perform
the necessary operations.
3 7 


A  0 2

8 5 

4 8


B  6 9 

1 0

C  2A  D
3 5


C  3 6 

0 7 

3B  4 A




6
 
D  3

0

The matrix below shows the yearly
sales of belts, hats, pants and shirts
at a local store over three years.
Which item shows a decrease in yearly
sales from Year 1 to Year 2?
The matrix below shows the number
of pastries sold at HotCakes Café
after one weekend.
Cupcakes
Brownies
Pies
Fri.
14
7
2
Sat.
3
18
7
Sun.
0
8
20
What are the dimensions of the matrix?
Which day were the least number of
pastries sold?
The matrix below shows the number of pastries
sold at HotCakes Café after one weekend.
Cupcakes
Brownies
Pies
Fri.
14
7
2
Sat.
3
18
7
Sun.
0
8
20
What percent of Friday’s sales were
brownies?
HotCakes Café:
Cupcakes
Brownies
Pies
Fri.
14
7
2
Sat.
3
18
7
Sun.
0
8
20
At Hastie’s Pastries, they sold half as
many pastries Friday, triple as many
pastries Saturday, and a fourth of each
pastry on Sunday. Create a matrix that
represents Hastie’s Pastries.
Matrix G shows the number of students at a
gym in the year 2000. Matrix M shows the
number of students at the same gym in
2005.
Create a matrix that represents the change
from 2000 to 2005.