1.
Simplify 2(
x
+ 10).
A.
12
x
B.
20
x
C.
2
x
+ 10
D.
2
x
+ 20
Hint
2.
Simplify 14(
b
– 10).
A.
14
b
– 140
B.
4
b
C.
14
b
– 10
D.
b
– 140
Hint
3.
Write 7 · 7 · 7 · 7 · 7 in exponential form.
A.
7
7
B.
5
7
C.
5
5
D.
7
5
Hint
4.
Write 10 · 10 · 10 in exponential form.
A.
3
1
B.
10
3
C.
1
3
D.
3
10
Hint
5.
Identify the like terms in the expression 13 +
x
+ 4 +
y
.
A.
x
, 4
B.
13, 4
C.
no like terms
D.
x
,
y
Hint
6.
Rewrite (4
s
+ 3
t
) + (11
s
+ 2
t
) using parentheses so that the like terms are grouped together.
A.
(4
s
+ 3
t
+ 11
s
+ 2
t
)
B.
There are no like terms.
C.
(4
s
+ 2
t
) + (3
t
+ 11
s
)
D.
(4
s
+ 11
s
) + (3
t
+ 2
t
)
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
+ 12
z
) + (-
z
+ 6
y
)
C.
There are no like terms.
D.
(5
y
+ 6
y
) + (-
z
+ 12
z
)
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.
2
b
+ 8
B.
2
b
+ (-8)
C.
8 - 2
b
D.
(-8) + 2
b
Hint
10.
Write 2 · 2 · 9 · 2 · 9 using exponents.
A.
8 · 9
2
B.
2
3
· 9
3
C.
2
3
· 9
2
D.
3
2
· 2
9
Hint