1.
Simplify 5
a
(4
a
2
– 2
a
) + 3
a
(-2
a
2
+ 4
a
).
A.
2
a
2
+ 10
a
B.
14
a
2
+ 2
a
C.
10
a
3
+ 4
a
2
D.
14
a
3
+ 2
a
2
Hint
2.
Solve 4
a
(
a
– 4) – 7
a
=
a
(4
a
– 3) + 20.
A.
a
= -2
B.
a
= -1
C.
a
= -6
D.
Hint
3.
Write an expression for the area of the rectangle shown below.
A.
12
xy
2
+ 4
x
3
y
B.
9
x
2
y
4
+ 12
x
4
y
3
C.
6
xy
2
+ 7
x
3
y
D.
6
xy
2
+ 4
x
3
y
Hint
4.
Multiply 4
x
2
(–
x
2
– 3
x
+ 2).
A.
–4
x
2
– 12
x
+ 8
B.
–4
x
4
– 12
x
3
+ 8
x
2
C.
–4
x
2
– 7
x
+ 8
D.
–4
x
4
– 7
x
3
+ 8
x
2
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.
20 uses
C.
5 uses
D.
It will never happen.
Hint