Can you guys explain to me how to find the measure of the third angle in two triangles?

Ok so all the angle of a triangle added up are equal to 180. So if you know that there is a 90 and a 53 degree, you subtract that from 180 and will find you last angle.
180-90=90
90-53=37
Your last angle is 37

820,000 is the answr

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south