Answer: v^2 -4v-21
Step-by-step explanation:
 
        
             
        
        
        
cant understand your language can you translate in English 
 
        
             
        
        
        
Answer: 2a - 7
<u>Step-by-step explanation:</u>
Ana: a
Mrs Vargas: 4a - 4
Leo: 2a + 3
  Mrs Vargas  -   Leo
=   (4a - 4)      -  (2a + 3)
=    4a - 4       -2a - 3
=    2a - 7
 
        
             
        
        
        
Answer:
(16.5 + 1.5n)° = (12 + 2n)° [given]
=> 16.5 – 12 = 2n – 1.5n 
=> 4.5 = 0.5n
=> n = 4.5/0.5
=> n = 9