1.
Find (4
x
2
+ 3
x
) + (7
x
2
– 5
x
– 6).
A.
11
x
2
– 8
x
– 6
B.
11
x
2
– 2
x
– 6
C.
9
x
– 6
D.
11
x
4
– 2
x
2
– 6
Hint
2.
Find the difference (-3
x
3
– 7
x
2
+ 5
x
– 4) – (6
x
2
– 8).
A.
–3
x
3
– 13
x
2
+ 5
x
- 12
B.
–3
x
3
– 13
x
2
+ 5
x
+ 4
C.
–3
x
3
–
x
2
+ 5
x
- 12
D.
-11
x
8
+ 4
Hint
3.
Find the polynomial that represents the measure of the perimeter of the triangle.
A.
15
xy
2
B.
7
xy
2
+ 10
x
– 2
y
C.
5
xy
2
+ 10
x
D.
7
x
3
y
6
+ 10
x
2
– 2
y
Hint
4.
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.
x
2
–
x
+ 1
B.
–19
x
2
+ 29
x
+ 45
C.
–
x
2
+
x
– 1
D.
19
x
2
+ 29
x
+ 45
Hint
5.
Suppose the perimeter of a triangle is given by
P
= 13
x
+ 5
y
, and two of its sides have lengths of 2
x
+
y
and 8
x
+ 4
y
. What is the length of the third side?
A.
3
x
+
y
B.
6
x
+ 3
y
C.
3
x
D.
23
x
+ 5
y
Hint