WorksheetsMatrix Test Review
Total questions: 19
Worksheet time: 2hrs 52mins
Name
Class
Date
1.
Dimensions?
a)
a
b)
b
c)
c
d)
d
2.
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
3.
Find A+B
a)
8 10
8 1
8 1
b)
12 25
7 1
7 1
c)
10 30
0 1
0 1
d)
can't add two together because the rows dont match columns
4.
find: B*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
5.
Multiply
a)
25
25
5
25
5
b)
-25
25
-5
25
-5
c)
-10
-10
-6
-10
-6
d)
10
10
6
10
6
6.
You can multiply a 2X3 matrix by which matrix?
a)
2X2
b)
2X12
c)
3X12
d)
2X3
7.
Multiply
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
8.
What do w, x, y and z equal in this matrix subtraction?
a)
w = 13, x = 4, y = 7, z = 23
b)
w = 13, x = -4, y = 11, z = 23
c)
w = 13, x = 4, y = 11, z = 23
d)
w = 13, x = 4, y = 11, z = 17
9.
How many rows are in a 7 x 3 matrix?
a)
7
b)
3
c)
21
d)
10
10.
What do a, b, c and d equal in this matrix addition?
a)
a = -1, b = 10, c = 7, d = -11
b)
a = -1, b = 10, c = -11, d = 7
c)
a = 10, b = -1, c = 7 , d = -11
d)
a = 10, b = -1, c = -11, d = 7
11.
Solve the system. Write the matrix equation on your own paper.
-5x + 5y = -10
-7x + 4y = 13
-5x + 5y = -10
-7x + 4y = 13
a)
(-7, -5)
b)
(-7, -9)
c)
(7, -9)
d)
(-7, 5)
12.
Find the product.
a)
undefined
b)
-3 16
17 12
8 -10
17 12
8 -10
c)
3 12
-15 -8
-1 -3
-15 -8
-1 -3
13.
Which matrix does NOT have an inverse?
a)
A
b)
B
c)
C
d)
D
14.
Find the inverse.
a)
5 -2
-3 1
-3 1
b)
-5 2
3 -1
3 -1
c)
-5 3
2 -1
2 -1
d)
1 -3
-2 5
-2 5
15.
Find the determinant's value
a)
-18
b)
-23
c)
-2
d)
2
16.
Calculate the determinant
a)
0
b)
none
c)
-32
d)
-8
17.
Which of the following is the inverse of the matrix A=
⌈3 0⌉
⌊0 2⌋
*Inverse=
¹∕detA × ⌈d −b⌉ ⌊−c a⌋
⌈3 0⌉
⌊0 2⌋
*Inverse=
¹∕detA × ⌈d −b⌉ ⌊−c a⌋
a)
[1/2 0]
[0 1/3]
[0 1/3]
b)
[-3 0]
[0 -2]
[0 -2]
c)
⌈1/3 0⌉
⌊0 1/2⌋
⌊0 1/2⌋
d)
[2 0]
[0 3]
[0 3]
18.
What is the inverse of the following matrix?
⌈4 −3⌉
⌊12 3⌋
*det= 38
⌈4 −3⌉
⌊12 3⌋
*det= 38
a)
⌈³∕₃₈ ³∕₃₈⌉
⌊−⁶∕₁₉ ²∕₁₉⌋
⌊−⁶∕₁₉ ²∕₁₉⌋
b)
⌈⁴∕₃₈ −³∕₃₈⌉
⌊¹²∕₃₈ ³∕₃₈⌋
⌊¹²∕₃₈ ³∕₃₈⌋
c)
⌈²∕₁₉ −³∕₃₈⌉
⌊−⁶∕₁₉ ³∕₃₈⌋
⌊−⁶∕₁₉ ³∕₃₈⌋
d)
⌈³∕₃₈ ³∕₃₈⌉
⌊−¹²∕₃₈ ⁴∕₃₈⌋
⌊−¹²∕₃₈ ⁴∕₃₈⌋
19.
Find the inverse.
a)
A
b)
B
c)
C
d)
D
100 %
