Answer:
C and E for sure 
Step-by-step explanation:
 
        
             
        
        
        
It has 2 solutions i believe
        
             
        
        
        
Answer:


Step-by-step explanation:


to use the elimination you have to make one of the numbers same 
so 

and you would have to change the sign so that both of the 3x could cancel out. 
New system of equation




so we know the y value so now you could find the x value take one equation 



you could try it with both of the equations 






 
        
             
        
        
        
The value of y in the triangle is 2√5
The triangle above is a right angle triangle.
Characteristics of a right angle triangle:
- One of its angle is equals to 90 degrees
- The sides can be found using Pythagoras theorem.
Using Pythagoras theorem
where
c = hypotenuse(longest side)
a and b are the 2 other legs. 
Therefore,
6² = 4² + y²
36 = 16 + y²
y² = 36 - 16
y² = 20
y = √20
y = 2√5
learn more on right angle triangle here:brainly.com/question/3770177?referrer=searchResults
 
        
                    
             
        
        
        
Answer:
19
Step-by-step explanation:
I think im wrong but give it a try