1.
Simplify 5
a
(4
a
2
– 2
a
) + 3
a
(-2
a
2
+ 4
a
).
A.
14
a
3
+ 2
a
2
B.
10
a
3
+ 4
a
2
C.
2
a
2
+ 10
a
D.
14
a
2
+ 2
a
Hint
2.
Solve 4
a
(
a
– 4) – 7
a
=
a
(4
a
– 3) + 20.
A.
a
= -1
B.
C.
a
= -2
D.
a
= -6
Hint
3.
Simplify 5(2
k
2
– 3
k
) – 6
k
(–
k
2
+
k
– 7).
A.
–6
k
3
+ 4
k
2
+ 27
k
B.
–6
k
3
+ 4
k
2
– 5
k
C.
6
k
3
+ 4
k
2
– 5
k
D.
6
k
3
+ 4
k
2
+ 27
k
Hint
4.
A worker has a cafeteria meal plan. The plan requires her to pay $20 for the card, and $1 each time
x
she uses it. If the company sells 100 cards, what is its total revenue?
A.
2100
B.
2000 + 100
x
C.
100
x
D.
2000
Hint
5.
Solve
x
(
x
– 2) + 2
x
(
x
+ 3) + 10 = 3
x
(
x
– 1) + 31.
A.
x
= 2
B.
x
= 3
C.
x
= 4
D.
x
= –2
Hint