1.
Simplify (4
r
-
s
) - (
r
+ 2
s
) + (3
r
-
s
).
A.
6
r
- 4
s
B.
6
r
- 3
s
C.
3
r
- 2
s
D.
8
r
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
+ 4
B.
–3
x
3
– 13
x
2
+ 5
x
- 12
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.
5
xy
2
+ 10
x
B.
7
x
3
y
6
+ 10
x
2
– 2
y
C.
7
xy
2
+ 10
x
– 2
y
D.
15
xy
2
Hint
4.
Simplify (7
x
2
+ 2
x
– 3) – (2
x
2
– 11
x
+ 4)
A.
B.
C.
D.
5
x
2
+ 13
x
– 7
Hint
5.
Determine whether the expression 5
x
3
y
3
–
x
2
y
2
is a polynomial.
A.
No, because there are two terms.
B.
No, because there are two variables.
C.
Cannot be determined from given information.
D.
Yes.
Hint