Linear Algebra Quiz
19 questions · no time limit
0:00
Finish quiz
SYSTEMS OF LINEAR EQUATIONS & MATRICES
Question 1
of 19
Flag for review
No time limit
Current
Answered
Flagged
Not seen
Let
A
=
(
k
2
1
−
3
)
A = \begin{pmatrix} k & 2 \\ 1 & -3 \end{pmatrix}
A
=
(
k
1
2
−
3
)
and
x
=
(
1
−
2
)
\mathbf{x} = \begin{pmatrix} 1 \\ -2 \end{pmatrix}
x
=
(
1
−
2
)
. The product
A
x
A\mathbf{x}
A
x
is the vector
(
−
6
7
)
\begin{pmatrix} -6 \\ 7 \end{pmatrix}
(
−
6
7
)
. What is the value of
k
k
k
?
A
k
=
−
10
k = -10
k
=
−
10
B
k
=
−
4
k = -4
k
=
−
4
C
k
=
−
2
k = -2
k
=
−
2
D
k
=
10
k = 10
k
=
10
YOUR PROGRESS
19
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
KEYBOARD
Pick an answer
A
B
C
D
Next question
↵
→
Previous
←
Flag for review
F