Answer:
5
Step-by-step explanation:
5x5=35
Let x = hours to meet
train one has a 2 hour head start or 210 km head start
210 + 105x = 135x
30x = 210
x = 7 hours to meet
Answer:
2
Step-by-step explanation:
Just use the quadratic formula
To find the average: the sum of the values/number of values
=250+310+275+195/4
=257.5