Let
x--------> the speed of the girl in step
y--------> the speed of the escalator in step
d------> the distance between ground and floor.
we know that

when the girl is going up on escalator
----> equation 
when the girl is going down on escalator
-------> equation 
Adds equation
and equation 

--------> equation 
Time to climb (in step) with y=0 (escalator standing still)
-----> equation 
Substitute equation
in equation 

therefore
the answer is

Answer:
Republican residents of County 1:
10.1
%
Democratic residents of County 1:
16.5
%
Total Republican residents:
58.9
%
Total Democratic residents:
41.1
%
Step-by-step explanation:
Answer: con que cariño?
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
A