WorksheetsMatrices
Total questions: 23
Worksheet time: 1hrs 11mins
Name
Class
Date
1.
What must be true in order to ADD two matrices?
a)
They must be square.
b)
The dimensions must be equal.
c)
The determinant can't equal 0.
d)
The column of the 1st must equal the row of the 2nd.
2.
You can multiply a 2X3 matrix by which matrix?
a)
2X2
b)
2X12
c)
3X12
d)
2X3
3.
In Matrix R (pictured) what is the value of element R3,2
a)
8
b)
9.01
c)
6
d)
1
4.
Add
a)
11 8
-4 2
-4 2
b)
3 2
-6 -6
-6 -6
c)
-3 2
-4 -6
-4 -6
d)
10 8
-6 2
-6 2
5.
Subtract
a)
3 -8
0 -1
0 -1
b)
3 -4
8 -13
8 -13
c)
-3 8
0 1
0 1
d)
3 -8
-8 1
-8 1
6.
what come first in the order
a)
column
b)
Row
7.
Dimensions?
a)
a
b)
b
c)
c
d)
d
8.
Element Address?
a)
a
b)
b
c)
c
d)
d
9.
Multipy the matrices.
a)
17 12
25 18
b)
8 9
12 6
c)
6 6
7 5
d)
12 10
10 12
10.
Multipy the matrices.
a)
1 2
6 -8
6 -8
b)
-3 -5
-5 -11
-5 -11
c)
-2 8
-6 -12
-6 -12
d)
2 -3
5 -2
5 -2
11.
Add.
a)
-2 4 -9
-1 -6 -17
-1 -6 -17
b)
-8 12 -9
1 6 17
1 6 17
c)
-8 4 -9
15 6 7
15 6 7
d)
-2 -4 -9
15 6 7
15 6 7
12.
Add.
a)
11 8
-4 2
-4 2
b)
3 2
-6 -6
-6 -6
c)
-3 2
-4 -6
-4 -6
d)
10 8
-6 2
-6 2
13.
find: B*A (B x A)
a)
47 30
9 5
9 5
b)
17 15
42 35
42 35
c)
10 25
7 1
7 1
d)
not possible because rows do not match columns
14.
What is a Matrix?
a)
An equation of over 5 numbers or symbols
b)
A set of numbers in rows and columns
c)
A method of finding the nth value of a series
d)
A complicated number system
15.
Can you multiply these 2?
a)
Yes
b)
No
c)
Maybe
d)
I don't know
16.
Find the product of the two matrices.
a)
1 2
6 -8
6 -8
b)
-3 -5
-5 -11
-5 -11
c)
-2 8
-6 -12
-6 -12
d)
2 -3
5 -2
5 -2
17.
These matrices are being multiplied. Determine the dimension/size of the new matrix.
a)
Can't multiply them
b)
4 x 2
c)
3 x 3
d)
4 x 3
18.
a)
1 2
6 -8
6 -8
b)
-3 -5
-5 -11
-5 -11
c)
-2 8
-6 -12
-6 -12
d)
2 -3
5 -2
5 -2
19.
Calculate the determinant
a)
0
b)
none
c)
-32
d)
-8
20.
Determine if the matrix has an inverse, if so find it.
a)
No
b)
0 1
-1 2
-1 2
c)
-1 3
1 -2
1 -2
d)
2 -1
-1 1
-1 1
21.
What is A-1?
a)
b)
c)
d)
22.
Find det(A)
a)
20
b)
-20
c)
60
d)
-60
23.
simplify.
a)
a
b)
b
c)
c
d)
d
100 %
