Answer:
77 "
Step-by-step explanation:
'mean' is the average of all of the heights
( 84 + 84  + 77 + 63 + 70 + 70  + x) / 7 = 75 
   x = 77
 
        
             
        
        
        
Its B, The answer for your question is B
 
        
                    
             
        
        
        
Two angles are complementary when they add up to 90 degrees<span> 
m</span>∠B = 90° - m∠A = 90° - 40° = 50°
Two angles are supplementary when they add up to 180 degrees 
m∠C = 180° - m∠B = 180° - 50° = 130°
        
             
        
        
        
The answer is K= 7 because 
-5-7=-12
        
                    
             
        
        
        
This is basically just saying you'll go outside Tuesday because it's sunny. Sunny weather is nice weather.