We must look at this question in steps
The first half of the journey is travelled at 40 km/h
Half of 100km is 50 km
Using the formula
Distance = Speed x Time
Speed = Distance / Time
Time = Distance / Speed
We can work out the time:
50km / 40km/h = 1.25 hours
Next we look at the second half of the journey
50km at 80km/h
50km / 80km/h = 0.625 hours
Add together both times to work out how long the entire journey took
1.25 + 0.625 = 1.875 hours
Using the Speed formula from before
Speed = 100km / 1.875 =
53 1/3 km/h or 53.3 recurring km/h
The answer is r = p/2n - x/n
Answer:
C
Step-by-step explanation:
THE THIRD CHOICE
Answer:
cost was 252
Step-by-step explanation:
Show all work including equations
Answer:
A
Step-by-step explanation:
angle A is 90 and c and b have to be equal
