1.
Simplify 2(
x
+ 10).
A.
2
x
+ 10
B.
20
x
C.
2
x
+ 20
D.
12
x
Hint
2.
Simplify 14(
b
– 10).
A.
4
b
B.
b
– 140
C.
14
b
– 10
D.
14
b
– 140
Hint
3.
Simplify –20(
z
– 5).
A.
-20
z
– 5
B.
20
z
+ 100
C.
-20
z
+ 100
D.
20
z
– 5
Hint
4.
Write 10 · 10 · 10 in exponential form.
A.
1
3
B.
3
10
C.
3
1
D.
10
3
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.
Identify the like terms in the expression 13 +
x
+ 4 +
y
.
A.
x
, 4
B.
x
,
y
C.
13, 4
D.
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.
There are no like terms.
C.
(5
y
+ 12
z
) + (-
z
+ 6
y
)
D.
(5
y
+ 6
y
) + (-
z
+ 12
z
)
Hint
8.
Rewrite 9
q
- 5
r
as an addition expression by using the additive inverse.
A.
(-5
r
) + 9
q
B.
5
r
- 9
q
C.
9
q
+ 5
r
D.
9
q
+ (-5
r
)
Hint
9.
Rewrite 2
b
- 8 as an addition expression by using the additive inverse.
A.
2
b
+ (-8)
B.
(-8) + 2
b
C.
2
b
+ 8
D.
8 - 2
b
Hint
10.
Write 2 · 2 · 9 · 2 · 9 using exponents.
A.
8 · 9
2
B.
3
2
· 2
9
C.
2
3
· 9
2
D.
2
3
· 9
3
Hint