1.
Find the dimensions of
A
6 × 3
·
B
3 × 1
.
A.
3 × 1
B.
3 × 3
C.
6 × 3
D.
6 × 1
Hint
2.
Find
A.
B.
C.
D.
Hint
3.
If
and
find 4
A
– 5
B
.
A.
B.
C.
D.
Hint
4.
Find the product of
A.
B.
C.
D.
Hint
5.
Given that
and
use the fact that
to find
AB
+
AC
.
A.
B.
C.
D.
Hint
and 
use the fact that 
to find AB + AC.