Answer:

Step-by-step explanation:
Given

 --- domain
 --- domain
Required
Determine the range
To do this, we simply substitute the values of n in the given expression
So, we have:






Hence, the range is:

 
        
             
        
        
        
Since angle COB is the central angle of arc CB, the measure of arc CB = 80 degrees
 
        
             
        
        
        
F(x , y) = x + y - xy, D is the closed triangular region with vertices (0, 0), (0 , 2) , and (4 , 0)
        
             
        
        
        
Multiplication property of equality
        
             
        
        
        
Answer:
The answer is 82 degrees.