Answer:
half of 84 is 42. Since the total difference is 18 meters you will increase one by 9m and decrease the other by 9m....therefore 42-9=33. 42+9=51
33
51
<span>4 hours after they leave Houston.
Easiest way to solve this problem is to first calculate the relative velocities of the two buses. Since they're traveling in opposite directions, you simply need to add their respective velocities to see what the relative velocity is between them.
55 mi/h + 45 mi/h = 100 mi/h
That means that the buses will increase their distance apart from each other by 100 miles for every hour that they travel. So divide 400 miles by 100 miles/hour
400 miles / 100 miles/hour = 4 hours.
So 4 hours after the buses start moving, they will be 400 miles apart from each other.</span>
you pay x for ten laps an you pay y for every additional lap you just multiply y by seven an add x
so all an all your answer would be (B)
