1.
Solve 5(4
x
– 3) = 6(2
x
+ 5) – 5.
A.
B.
x
= 5
C.
D.
Hint
2.
Multiply 4
x
2
(–
x
2
– 3
x
+ 2).
A.
–4
x
4
– 12
x
3
+ 8
x
2
B.
–4
x
2
– 12
x
+ 8
C.
–4
x
4
– 7
x
3
+ 8
x
2
D.
–4
x
2
– 7
x
+ 8
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 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
= –2
B.
x
= 4
C.
x
= 3
D.
x
= 2
Hint