Answer:
40+10=50
40+-15=25
40+-30=10
40+-40=0
40+-50=-10
20+-25=-5
Step-by-step explanation:
in this order
Answer:
A. 
B. 
and
D. 
Step-by-step explanation:
A rational function is of the form
where
and
are polynomial functions.
Based on this definition, every polynomial function is a rational function.
Hence the rational functions in the options provided are;
A. 
B. 
and
D. 
is not a rational function because the numerator is not a polynomial function.