1.
Write
as a rational expression.
A.
B.
C.
D.
Hint
2.
A.
B.
C.
D.
Hint
3.
A.
B.
C.
D.
Hint
4.
Simplify
.
A.
B.
C.
D.
Hint
5.
Consider
. Which of the variables can be 0 if it is true that
?
A.
w
and
y
B.
y
only
C.
w
,
x
, and
y
D.
w
only
Hint
. Which of the variables can be 0 if it is true that 
?