Answer:
1. Is correct
2. Isn't correct, (It would be number 1)
3. I'm unsure, (But I believe its number 1)
Step-by-step explanation:
2. These are angles across from each other.
3.  These are Angles of the same side that don't over lap.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
here is a photo for you 
mark me as brainliest if this helped 
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Standard form:

Vertex form:

(h, k) is the vertex
x is the coordinate of the vertex
To find x use the formula:


a=1
b=-2
c=-6
Substitute:

Substitute x in equation:

h=1
k=-7
Substitute h, and k into the vertex formula:

 
        
                    
             
        
        
        
Work is provided in the image attached.