Answer:
B
Step-by-step explanation:
Start by breaking down the equation 
-1/2 x 10 = -5
-1/2x1/4=-1/4
Then combine your answer 
-5=1/8
  
        
             
        
        
        
Answer:
77
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
c
Step-by-step explanation:
1 + tan²theta = sec²theta
tan²theta = 3² - 1
tan²theta = 8
tan theta = sqrt(8) 
Positive because Quadrant 1
sqrt(8) = sqrt(4×2) = sqrt(4)×sqrt(2) 
= 2×sqrt(2)
 
        
             
        
        
        
Given,
 Nepali speaker : 80% (Y)
 Maithili speaker : 60% (X)
We know that,
 Both language speaker = Y -X
Now,
 Y- X 
 = 80- 60
 = 20
Therefore, 20% people speak both languages