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