1.
Find –8
x
3
y
2
(3
xy
4
– 2
x
5
–
y
).
A.
–5
x
4
y
6
- 10
x
8
y
2
- 9
x
3
y
3
B.
–24
x
4
y
6
+ 16
x
15
y
2
+ 8
x
3
y
3
C.
–24
x
4
y
6
+ 16
x
8
y
2
+ 8
x
3
y
3
D.
–24
x
4
y
6
- 16
x
8
y
2
+ 8
x
3
y
3
Hint
2.
Solve 4
a
(
a
– 4) – 7
a
=
a
(4
a
– 3) + 20.
A.
B.
a
= -6
C.
a
= -2
D.
a
= -1
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.
2000 + 100
x
C.
100
x
D.
2100
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.
It will never happen.
C.
20 uses
D.
10 uses
Hint
5.
Solve
x
(
x
– 2) + 2
x
(
x
+ 3) + 10 = 3
x
(
x
– 1) + 31.
A.
x
= 3
B.
x
= 4
C.
x
= 2
D.
x
= –2
Hint