Answer:
5
Step-by-step explanation:
Both angles together will equal as they are opposite of each other 
therefore
15x=16x-5
15x+5=16x
5=x
 
        
                    
             
        
        
        
Answer:
A
Step-by-step explanation:
Either A or D, this question made me lose braincells, you should get a new teacher
 
        
                    
             
        
        
        
Answer:
If you mean: y =(lnx)
3  
then:  
dy  
/dx = [3(lnx)
Step-by-step explanation:
 
        
             
        
        
        
Answer:
vertical angles
Step-by-step explanation:
angles 6 and 7 are formed by the same two lines and are on opposite sides  of the intersection point