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.
a
= -6
C.
D.
a
= -2
Hint
3.
Simplify 5(2
k
2
– 3
k
) – 6
k
(–
k
2
+
k
– 7).
A.
6
k
3
+ 4
k
2
– 5
k
B.
6
k
3
+ 4
k
2
+ 27
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.
2000 + 100
x
B.
100
x
C.
2100
D.
2000
Hint
5.
A cafeteria has two meal plans. One requires the worker to pay $20 for the card, and $1 each time
x
she uses it. The other plan requires the worker to pay $30 for the card, but only $0.50 each time
x
she uses it. After how many uses will the workers with different plans have spent the same amount of money?
A.
10 uses
B.
It will never happen.
C.
20 uses
D.
5 uses
Hint