I think 30c+3d would be the correct answer.
        
                    
             
        
        
        
Answer:
x = 38
∠P = 26º
Step-by-step explanation:
The sum of the angle in a triangle is 180
x + (x + 78) + (x - 12) = 180
Combine like terms
3x + 66 = 180
Subtract 66 from both sides
3x = 114
Divide both sides by 3
x = 38
-----------------------
∠P = x - 12
∠P = 38 - 12
∠P = 26º
 
        
                    
             
        
        
        
Step-by-step explanation:
-(38/21)
that is the answer
 
        
                    
             
        
        
        
Answer:
 The lower quartile of Class A is greater than the lower quartile of Class B. 
Class A has a Greater number of lower quartiles then Class B as the imagie shows. Class A has 65-75 while class B has 70-75.