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