Answer:
 second option: (4, 4) is the solution to both lines A and B.
Step-by-step explanation:
 You know that the equation of line A is:
 
 and the equation of line B is:
 
 The point in which the line A intersects with the line B is the solution of the sytstem of equations.
 You can observe in given graph that the point of intersection of Line A and Line B is: (4,4)
 Therefore (4, 4) is the solution to both lines A and B.
 
 
        
                    
             
        
        
        
Answer:
θ = π + periods of 2π
Sin (π + 2π) = 0
Cos (π + 2π) = -1 
Tan (π + 2π) = 0
Step-by-step explanation:
Sin (θ)=0 implies that θ only can be 0 or π plus periods of 2π:
θ = 0+2π
θ = π+2π
For Cos(θ) the values only can be:
Cos (0+2π) = 1 and 
Cos (π+2π) = -1
from this, only Cos (π+2π) < 0
So θ only can be θ=π+2π
 
        
                    
             
        
        
        
17 Answer:  205
<u>Step-by-step explanation:</u>


18 Answer:  1968
<u>Step-by-step explanation:</u>


19 Answer:  -116
<u>Step-by-step explanation:</u>

 
        
             
        
        
        
Answer: You find midpoint by adding the two x values together and dividing by 2, then adding the two y values together and dividing by two. 
 
        
             
        
        
        
its 3 1/4 you will thank me later :)