Answer:
2hrs 40 minutes
Step-by-step explanation:
The formula for distance is expressed as:

#The time taken to run:

#The time taken to walk:

#Since the distances are the same:

Hence, Dana spends 2hrs 40 minutes walking back
Answer:
5x-y-36=0
Step-by-step explanation:
y+4=5x-40
5x-y=36
36 = 2 x 2 x 3 x 3 (Answer C)
39 students....39/4 = 9 remainder 3
39/5 = 7 remainder 4
ur answer is 39