Can someone answer these questions?

5.a) since the distance is 140km, and the time is 2hours, and we need the speed in km/h,  we have to divide the distance by time, and we will get the speed: s=d/t = 140km/2h = 70km/h

b) the distance is 43km, and the time is 30 minutes, which is 0,5hours, we do the same thing here, with given formula : s=d/t = 43km/0,5h = 86km/h

answer: i'm not sure

step-by-step explanation:

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72