Answer:
(a) S=
(B) S(average speed)=65.04
Step-by-step explanation:
Given
D=S*T
So, S=
and
T=11.5 Hr
D=748 Km.
S(average speed)==65.04 kmph
-8(2x+4)+8(4+7x)=8x+3x
1 answer:
You might be interested in
Recall your d = rt, distance = rate * time
the rate going south is 13, the rate going east is 10
it took a total amount of 6hours and 72miles for the whole travel
so.. if going say hmmm South, it covered a distance of "d", then going East it covered a distance of the slack from 72 and "d", it covered "72 - d" miles
so, if going South it took "t" hours, then going East it took the slack from 6 and "t", or "6 - t" hours
thus
solve for "t"
so, it travelled East for 6-t hours
the rate going south is 13, the rate going east is 10
it took a total amount of 6hours and 72miles for the whole travel
so.. if going say hmmm South, it covered a distance of "d", then going East it covered a distance of the slack from 72 and "d", it covered "72 - d" miles
so, if going South it took "t" hours, then going East it took the slack from 6 and "t", or "6 - t" hours
thus
solve for "t"
so, it travelled East for 6-t hours