1.
Which element is in row 3, column 1?
A.
6
B.
4
C.
-1
D.
9
Hint
2.
Solve [3
x
8
y
] = [-12 1] for
x
and
y
.
A.
x
= 4
y
= 1
B.
x
= -12
y
= 1
C.
x
= -4
y
=
D.
x
= -4
y
= 8
Hint
3.
The matrix
is an example of which of the following matrices?
A.
square matrix
B.
all of the above
C.
row matrix
D.
column matrix
Hint
4.
What is always true of an
n
×
n
matrix?
A.
It is a square matrix.
B.
It is a column matrix.
C.
It has at least two rows and two columns.
D.
It is a row matrix.
Hint
5.
Solve
A.
(–2, 1)
B.
(–1, 2)
C.
(1, –2)
D.
(2, –1)
Hint