Answer:
theres no solution 
Step-by-step explanation:
There are no values of  x  that make the equation true.
No solution
 
        
                    
             
        
        
        
Answer:
12
Step-by-step explanation:
 12 because that's how many dots/vertices are shown(sorry if im wrong)
 
        
                    
             
        
        
        
Answer:
The correct answer is A which is

Step-by-step explanation:
The angle of elevation from the submarine to the boat is  .
.
This is the angle through which an observer from the submarine will raise the head before seeing the boat.
 See diagram in the attachment for illustration.
 
        
             
        
        
        
Percent means parts out of 100
x/100=x%
4/5=x%
4/5=x/100
times 100 oth sides
400/5=x
80=x
80% do
100-do=do not have
100-80=20
answer is 20%