1.
Simplify 3(2
a
+
b
) + 6(
a
- 2
b
).
A.
12
a
- 9
b
B.
12
a
+ 9
b
C.
12
a
+ 15
b
D.
12
a
+
b
Hint
2.
Simplify (18
q
3
r
)(2
q
r
4
).
A.
36
q
3
r
4
B.
36
q
r
C.
36
q
4
r
5
D.
36
q
3
r
5
Hint
3.
Simplify (-3
a
5
b
3
)
4
.
A.
-12
a
9
b
7
B.
-12
a
20
b
12
C.
-81
a
9
b
12
D.
81
a
20
b
12
Hint
4.
Simplify the expression 8 (
a
+ 2
b
) – 7
b
+ 6 (3
a
–
b
).
A.
26
a
– 6
b
B.
152
a
– 88
b
C.
26
a
+ 3
b
D.
4
a
– 6
b
Hint
5.
If
a
= –3 and
b
= 4, what is
A.
12
B.
15
C.
–11
D.
–27
Hint