Answer:
Step-by-step explanation:
40% is the correct answer 
 
        
                    
             
        
        
        
Answer:
b =  c − 2a 
      ------------
           2
Step-by-step explanation:
2a + 2b = c
2b = c − 2a
 b =  c − 2a 
      ------------
           2
 
        
             
        
        
        
Answer: PQ = 18
Step-by-step explanation:
You would divide 21/14 to see what the size difference in the triangles is to get 1.5. 1.5x12=18
 
        
                    
             
        
        
        
Answer:
NOPE
Step-by-step explanation: