1.
Simplify (4
x
3
) (3
x
5
).
A.
7
x
8
B.
12
x
15
C.
12
x
8
D.
7
x
15
Hint
2.
Simplify (3
a
4
b
5
c
)
4
.
A.
12
a
8
b
9
c
5
B.
7
a
16
b
20
c
4
C.
3
a
16
b
20
c
4
D.
81
a
16
b
20
c
4
Hint
3.
Simplify (4
x
2
y
) (2
x
y
2
z
3
)
3
.
A.
32
x
5
y
7
z
9
B.
24
x
5
y
7
z
9
C.
32
x
6
y
6
z
9
D.
8
x
5
y
7
z
9
Hint
4.
Simplify (3
a
4
b
2
)
2
(2
a
3
bc
2
)
3
.
A.
72
a
17
b
7
c
6
B.
36
a
17
b
7
c
6
C.
6
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.
B.
C.
6
x
2
y
2
D.
x
4
Hint