Answer:
1) 9:14
2)4:1
Step-by-step explanation:
You have to have all of the teachers compared to all of the adults (teachers included) 
You have to simplify 12:3 and you get 4:1. 
 
        
                    
             
        
        
        
Answer:
how to do this
Step-by-step explanation:
 
        
             
        
        
        
1+tan^2(A) = sec^2(A) [Pythagorean Identities]
tan^2(A)cot(A) = tan(A)[tan(A)cot(A)] = tan(A)[1] = tan(A)
*see photo for complete solution*
 
        
        
        
Either a pecan or walnut means you add the probabilities together
20% plus 35% equals 55%