1.
Find the difference:
A.
8
x
- 1
B.
2
x
- 5
C.
2
x
- 1
D.
8
x
- 5
Hint
2.
What is (2
p
2
+ 6
pq
-
q
2
) decreased by (3
p
2
+ 2
pq
+ 3
q
2
)?
A.
-
p
2
+ 4
pq
- 4
q
2
B.
-
p
2
- 4
pq
- 4
q
2
C.
-
p
2
- 4
pq
+ 4
q
2
D.
p
2
- 4
pq
+ 4
q
2
Hint
3.
Find the difference of (7
x
2
+ 12
x
– 5) and (5
x
2
–
x
+ 1).
A.
2
x
2
+ 11
x
– 4
B.
2
x
2
+ 11
x
– 6
C.
12
x
2
+ 11
x
– 4
D.
2
x
2
+ 13
x
– 6
Hint
4.
Find (9
x
2
+ 6
x
+ 3) – (6
x
2
– 4
x
+ 2) then evaluate the difference for
x
= -2.5.
A.
18.75
B.
-1.25
C.
44.75
D.
-5.25
Hint
5.
Kelly and Dina are running in a marathon. After
t
minutes, Kelly has run 7
t
2
- 6
t
feet and Dina has run 4
t
2
+ 3
t
feet. How far ahead of Dina is Kelly after 20 minutes?
A.
1,020 ft
B.
1,380 ft
C.
1,140 ft
D.
4,340 ft
Hint