Answer:
Step-by-step explanation:
 hello : here is an solution 
 
        
             
        
        
        
Given:
The figure of a triangle.
To find:
The missing length.
Solution:
Let x be the missing length.
Basic proportionality theorem(BPT): According to this theorem, if a line is parallel to the one side of a triangle then that the line intersects the other two sides of the triangle in the same ratio.
Using Basic proportionality theorem, we get




Adding x on both sides, we get




The missing length is 3 Therefore, the correct option is D.
 
        
             
        
        
        
                    3
the ans is 3 --- 
                    4
cause blue is 5 times of red. 
        
             
        
        
        
I think its d, because A and Cs angles make 180. And B has two equal sides that make it possible to make a triangle. Sorry i couldnt be more helpful
        
                    
             
        
        
        
Answer:
C.
Step-by-step explanation:
-a + b = -2
b = a + 3
-a + a + 3 = -2 
3 = -2 (incorrect).....no solutions.....because these lines are parallel