Answer:
B the anser is B
Step-by-step explanation:
you hafto to do it like B bc its the most comen sens one
.............................
The quadcopter's average velocity is given in terms of change in position by

where
, the difference in the quadcopter's final and initial positions and
.
The
-component of the average velocity is 2.70 m/s, so

and the
-component is -2.50 m/s, so

So the train is pulling about 50 cars in total, and there's about 30 boxes of freight in each car.
30 x 50 = 1500
The best estimate would be near 1500 boxes of freight through the whole train.
-10.3 + y = 5.2
First, regroup the terms. / Your problem should look like:
Second, add 10.3 to both sides. / Your problem should look like:
Third, add 5.2 + 10.3 to get 15.5 / Your problem should look like:

Answer:
y = 15.5 (D)