Since we know this figure is a square, we also know that all sides are the same. Therefore, we must figure out one side length and then use that math to find the other point. A simple way to do this is to graph the points and match them up for the missing corner.
In the graph below, you will see that
(-6, -3) is circles in red, showing that it is the correct answer. The red dots show how we could match up the corners to find the answer.
Answer:
The cities are approximately 1452 km apart
Step-by-step explanation:
The two cities are on the same Longitude 90°W therefore the distance between them is on a great circle
Latitude of the first city = 23°N
Latitude of the second city = 36° N
Because their latitude are on the same polar axis, we subtract to get the angular difference
Angular Difference = 36 -23 =13°

where 

The cities are approximately 1452 km apart
Answer:
Any of the 4 sequences gives another rectangle
Explanation:
Any rotation or traslation you make over a rectangle wont change the fact that you have still a rectangle.
The same will happen if you make a reflection of any on the axis. Therefore any of the 4 sequences given will give you a rectangle.