Question 927767
t1 = t = the time it took to go from home to the airport where the helicopter was
t2 = 2-t =  the time starting at the airport and ending at the corporate offices

r1 = 30
r2 = 80
d =  135 
Using the d= rt formula and putting in what you know:

We need to find t:

 d = r1 * t1  + r2 * t2

135 = 30 *t + 80 (2-t)
135 = 30t + 160 -80t
-25 =-50t

t = 0.5 h

Now we aren't finished because the question asked for the distance between the
airport and the corporate offices.  We have a figure of time.  

we need to find  d2 = r2 * t2.  We know t2 = 2-t.   t2 = 2-0.5 = 1.5 h


d2 = r2 * t2 = 80 * 1.5 = 120mi

The distance is 120 mi