1.
Which statement illustrates the associative property of multiplication?
A.
(2
x
)
y
= 2
xy
B.
(2
x
)
y
= (
x
· 2)
y
C.
(2
x
)
y
= 2(
xy
)
D.
(2
x
)
y
=
y
(2
x
)
Hint
2.
Simplify 3 + 2(
xy
+ 3
z
) + 4
xy
.
A.
9
xy
+ 15
z
B.
5
xy
+ 3
z
+ 3
C.
6
xy
+ 6
z
+ 3
D.
6
xy
+ 3
z
+ 3
Hint
3.
Evaluate 2 × 17 × 5.
A.
170
B.
190
C.
160
D.
180
Hint
4.
Evaluate 0.75 + 2.2 + 0.25 + 0.8.
A.
4
B.
5
C.
6
D.
3
Hint
5.
Simplify 2
x
+ 5
x
+ 4(
x
+ 3).
A.
14
x
B.
11
x
+ 3
C.
11
x
+ 12
D.
23
x
Hint