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 (-3
a
5
b
3
)
4
.
A.
-12
a
9
b
7
B.
-81
a
9
b
12
C.
81
a
20
b
12
D.
-12
a
20
b
12
Hint
3.
Simplify the expression 8 (
a
+ 2
b
) – 7
b
+ 6 (3
a
–
b
).
A.
4
a
– 6
b
B.
26
a
+ 3
b
C.
26
a
– 6
b
D.
152
a
– 88
b
Hint
4.
Simplify
A.
B.
27
x
3
n
y
6
C.
D.
Hint
5.
If
a
= –5 and
b
= 7, what is
A.
145
B.
–114
C.
–76
D.
–174
Hint