Im pretty sure the Correct answer is D 
I Could be Wrong Tho.
 
        
                    
             
        
        
        
Answer:
105 
Step-by-step explanation:
l is parallel m so angle 3+angle 6=180
 
        
             
        
        
        
Answer: (c)
Step-by-step explanation:
Given

Here, 
To get  , replace
, replace  in
 in  by
 by 

Using  and
 and  it can be concluded that the domain of
  it can be concluded that the domain of  is all real numbers except 0.
 is all real numbers except 0.
Therefore, its domain is given by 

Option (c) is correct.