1.
Which element is in row 3, column 1?
A.
-1
B.
4
C.
9
D.
6
Hint
2.
Choose the matrix that represents the ordered triple (5, -7, 1).
A.
B.
C.
[1 -7 5]
D.
[5 -7 1]
Hint
3.
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
= 8
D.
x
= -4
y
=
Hint
4.
What are the dimensions of matrix
A
if
A.
4 × 3
B.
4 × 4
C.
3 × 3
D.
3 × 4
Hint
5.
Solve
A.
(–1, 2)
B.
(1, –2)
C.
(–2, 1)
D.
(2, –1)
Hint