1.
Simplify (4
x
3
) (3
x
5
).
A.
7
x
8
B.
12
x
8
C.
7
x
15
D.
12
x
15
Hint
2.
Simplify (7
a
4
b
) (8
a
7
b
6
).
A.
15
a
11
b
7
B.
56
a
11
b
7
C.
56
a
28
b
6
D.
15
a
28
b
6
Hint
3.
Simplify (4
y
4
)
3
.
A.
64
y
12
B.
12
y
3
C.
64
y
64
D.
12
y
12
Hint
4.
Simplify (3
a
4
b
2
)
2
(2
a
3
bc
2
)
3
.
A.
6
a
17
b
7
c
6
B.
72
a
17
b
7
c
6
C.
36
a
17
b
7
c
6
D.
17
a
12
b
8
c
5
Hint
5.
Suppose that the base of a triangle is 3
x
y
and its height is also 3
x
y
. What is its area, expressed as a monomial?
A.
x
4
B.
C.
D.
6
x
2
y
2
Hint