1.
Simplify 2(
x
+ 10).
A.
20
x
B.
12
x
C.
2
x
+ 20
D.
2
x
+ 10
Hint
2.
Simplify 14(
b
– 10).
A.
4
b
B.
14
b
– 140
C.
b
– 140
D.
14
b
– 10
Hint
3.
Simplify –20(
z
– 5).
A.
20
z
+ 100
B.
-20
z
+ 100
C.
20
z
– 5
D.
-20
z
– 5
Hint
4.
Write 10 · 10 · 10 in exponential form.
A.
1
3
B.
3
1
C.
10
3
D.
3
10
Hint
5.
Identify the like terms in the expression 2
n
+ 8 - 5
n
+ 2
m
.
A.
8, -5
n
B.
no like terms
C.
2
n
, -5
n
D.
2
n
, 2
m
Hint
6.
Rewrite (4
s
+ 3
t
) + (11
s
+ 2
t
) using parentheses so that the like terms are grouped together.
A.
(4
s
+ 2
t
) + (3
t
+ 11
s
)
B.
(4
s
+ 11
s
) + (3
t
+ 2
t
)
C.
(4
s
+ 3
t
+ 11
s
+ 2
t
)
D.
There are no like terms.
Hint
7.
Rewrite (5
y
-
z
) + (6
y
+ 12
z
) using parentheses so that the like terms are grouped together.
A.
(5
y
-
z
) + (6
y
+ 12
z
)
B.
(5
y
+ 6
y
) + (-
z
+ 12
z
)
C.
There are no like terms.
D.
(5
y
+ 12
z
) + (-
z
+ 6
y
)
Hint
8.
Rewrite 4 - 7
a
as an addition expression by using the additive inverse.
A.
4 + (-7
a
)
B.
7
a
- 4
C.
4 + 7
a
D.
(-7
a
) + 4
Hint
9.
Rewrite 2
b
- 8 as an addition expression by using the additive inverse.
A.
(-8) + 2
b
B.
2
b
+ 8
C.
8 - 2
b
D.
2
b
+ (-8)
Hint
10.
Write 2 · 2 · 9 · 2 · 9 using exponents.
A.
2
3
· 9
2
B.
3
2
· 2
9
C.
2
3
· 9
3
D.
8 · 9
2
Hint