Answer:
Step-by-step explanation:

Both of the answers are 50%. your welcome person.
Step-by-step explanation:
speed = distance/time
time = t = distance/speed
t = 180/b + (400-180)/c = 180/b + 220/c = 20(9/b + 11/c)
By looking at this question my best bet is The third one.
Answer:
-1.5
-0.75
0.75
1.75
Step-by-step explanation: