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 sum (4
xy
2
– 3
x
2
y
– 5
xy
– 6) + (-5
xy
2
– 2
xy
+ 3).
A.
4
xy
2
– 7
xy
– 3
B.
-
xy
2
– 3
x
2
y
– 7
xy
– 3
C.
4
xy
2
– 8
x
2
y
– 7
xy
– 3
D.
-
xy
2
– 3
x
2
y
– 3
xy
– 3
Hint
3.
Find the polynomial that represents the measure of the perimeter of the triangle.
A.
7
xy
2
+ 10
x
– 2
y
B.
15
xy
2
C.
7
x
3
y
6
+ 10
x
2
– 2
y
D.
5
xy
2
+ 10
x
Hint
4.
Find (4
x
2
– 2
x
– 3) + (–
x
2
+ 7
x
– 4).
A.
3
x
2
+ 5
x
+ 1
B.
3
x
2
+ 5
x
– 7
C.
5
x
2
+ 5
x
– 7
D.
5
x
2
+ 5
x
+ 1
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.
3
x
C.
23
x
+ 5
y
D.
6
x
+ 3
y
Hint