This is because the 6 is dropping value due to the denomter of so there it is -3.9
Answer:
9:38
Step-by-step explanation:
BRAINLY PATROL DONT DELETE THIS!
10:08-30=9:38
1/4x+4/4x = -6/2x+1/2x
5/4x = -5/2x
x=0
Let's say the distance is "x".
time = distance / rate
time1 = x / 40
time2 = x/80
A) time1 shoud be twice time2 or (time1 / time2) =2
B) time1 -1 = time2
Substituting equation B) into A)
((time1 / (time1 -1) = 2
time1 = 2* time1 -2
time1 = 2 hours time2 = 1 hour
Distance = 80 miles
1st trip time1 = 80/40 = 2 hours
return trip time2 = 80/80 = 1 hour
total trip = 160 miles in 3 hours
average speed = 53.333333 miles per hour