1.
Find the difference (-3
x
3
– 7
x
2
+ 5
x
– 4) – (6
x
2
– 8).
A.
-11
x
8
+ 4
B.
–3
x
3
– 13
x
2
+ 5
x
+ 4
C.
–3
x
3
– 13
x
2
+ 5
x
- 12
D.
–3
x
3
–
x
2
+ 5
x
- 12
Hint
2.
Find the difference (-7
x
4
y
2
– 3
x
2
y
+ 2
xy
2
– 5) – (4
x
4
y
2
–
xy
2
– 5).
A.
-11
x
4
y
2
- 3
x
2
y
+ 3
xy
2
- 10
B.
-11
x
4
y
2
- 3
x
2
y
+ 3
xy
2
C.
-11
x
4
y
2
- 3
x
2
y
+
xy
2
- 10
D.
-3
x
4
y
2
- 4
xy
2
+ 2
xy
2
- 10
Hint
3.
Find the polynomial that represents the measure of the perimeter of the triangle.
A.
7
xy
2
+ 10
x
– 2
y
B.
7
x
3
y
6
+ 10
x
2
– 2
y
C.
15
xy
2
D.
5
xy
2
+ 10
x
Hint
4.
Find (4
x
2
– 2
x
– 3) + (–
x
2
+ 7
x
– 4).
A.
5
x
2
+ 5
x
– 7
B.
3
x
2
+ 5
x
– 7
C.
3
x
2
+ 5
x
+ 1
D.
5
x
2
+ 5
x
+ 1
Hint
5.
Anthony and Sanford each throw a football. The height of Anthony's throw can represented by the equation
A
= –10
x
2
+ 15
x
+ 22, where
A
is height and
x
is the time in seconds. The height of Sanford's throw can represented by the equation
S
= –9
x
2
+ 14
x
+ 23. At time
x
, what is the combined height of the throws?
A.
19
x
2
+ 29
x
+ 45
B.
–
x
2
+
x
– 1
C.
–19
x
2
+ 29
x
+ 45
D.
x
2
–
x
+ 1
Hint