1.
Solve 4
a
(
a
– 4) – 7
a
=
a
(4
a
– 3) + 20.
A.
a
= -2
B.
a
= -6
C.
D.
a
= -1
Hint
2.
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
– 5
k
C.
–6
k
3
+ 4
k
2
+ 27
k
D.
6
k
3
+ 4
k
2
+ 27
k
Hint
3.
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
B.
2100
C.
2000 + 100
x
D.
100
x
Hint
4.
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.
5 uses
B.
20 uses
C.
It will never happen.
D.
10 uses
Hint
5.
Solve
x
(
x
– 2) + 2
x
(
x
+ 3) + 10 = 3
x
(
x
– 1) + 31.
A.
x
= 4
B.
x
= –2
C.
x
= 2
D.
x
= 3
Hint