Loss: 3 (spaceships) * 20 (points per spaceship)
Gain: 250 (points)
Total: -(3*20) + 250 = +190
Answer:

Step-by-step explanation:
number of counties = 159
n number of people are mutually independent and equally likely home locations
considering the details given in the question
n ≤ 159
The number of ways for people ( n ) will live in the different counties (159) can be determined as
since the residents are mutually independent and equally likely home locations hence there are :
ways for the residents to live in
therefore the probability = 
Using simple proportion it would be
87 * 9570
------------ = 7569 people
110
To find slope it is rise over run which is 20/60 but that can be reduced to 1/3. Do your equation of the line is y=1/3x