Answer:
A.
Step-by-step explanation:
It's the first one. The angles are supplementary not complementary.
 
        
             
        
        
        
Answer:7
Step-by-step explanation:
Simplifying, 6x-2x-8 = 6 + 2x
4x -8 = 6 + 2x
2x =14
x=7
 
        
                    
             
        
        
        
Answer:
F&H are vertical angles, D&H are corresponding angles, E&H are adjacent angles, and B&H are alternate interior angles.
Step-by-step explanation:
Hope this helps. Tell me if you need and explanation.
 
        
                    
             
        
        
        
Answer:
Yes
Step-by-step explanation:
The smaller two sides have to be greater than the biggest side. 
2+8>9, so it can make a triangle. 
 
        
             
        
        
        
Answer:
y=2x^2+1
Step-by-step explanation:
I checked on photo maths