1.
Simplify 2(
x
+ 10).
A.
12
x
B.
20
x
C.
2
x
+ 10
D.
2
x
+ 20
Hint
2.
Simplify –11(
t
+ 1).
A.
-11
t
– 11
B.
11
t
+ 1
C.
-11
t
+ 1
D.
11
t
+ 11
Hint
3.
Simplify –20(
z
– 5).
A.
20
z
– 5
B.
-20
z
– 5
C.
20
z
+ 100
D.
-20
z
+ 100
Hint
4.
Identify the like terms in the expression 13 +
x
+ 4 +
y
.
A.
no like terms
B.
13, 4
C.
x
,
y
D.
x
, 4
Hint
5.
Identify the like terms in the expression 7
a
+
b
+ 7 - 15
b
.
A.
b
,
c
B.
b
, -15
b
C.
7
a
, 7
D.
no like terms
Hint
6.
Rewrite (5
y
-
z
) + (6
y
+ 12
z
) using parentheses so that the like terms are grouped together.
A.
(5
y
+ 12
z
) + (-
z
+ 6
y
)
B.
(5
y
+ 6
y
) + (-
z
+ 12
z
)
C.
(5
y
-
z
) + (6
y
+ 12
z
)
D.
There are no like terms.
Hint
7.
Rewrite 4 - 7
a
as an addition expression by using the additive inverse.
A.
4 + 7
a
B.
(-7
a
) + 4
C.
7
a
- 4
D.
4 + (-7
a
)
Hint
8.
Rewrite 9
q
- 5
r
as an addition expression by using the additive inverse.
A.
9
q
+ 5
r
B.
(-5
r
) + 9
q
C.
5
r
- 9
q
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.
3
2
· 2
9
B.
8 · 9
2
C.
2
3
· 9
2
D.
2
3
· 9
3
Hint