The part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
        
             
        
        
        
I don’t know spanish sorry
        
             
        
        
        
Answer:
36
Step-by-step explanation:
you would just to 39^2-15^2 which is 1296 and the square root of that is 36 so 36 would be the answer 
 
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
the side length is equal to sqrt(33) 
sqrt(33)  = 5.74, closest to 5 3/4 
 
        
             
        
        
        
Answer:
b = -7     please mark brainliest :))))
Step-by-step explanation: