c^2 = a^2 + b^2 - 2(ab)(cos C)
c^2 + 2(ab)(cos C) = a^2 + b^2
2(ab)(cos C) = a^2 + b^2 - c^2
cos C = (a^2 + b^2 - c^2) / 2ab - Answer choice E
Hope this helps! :)
 
        
             
        
        
        
Answer:
its 7/3 or you could put 2 1/3
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
C.None of these
Step-by-step explanation:
atleast I think
 
        
                    
             
        
        
        
Answer:
 9    3/4  inches
Step-by-step explanation:
If we are finding how much taller Sara is, we need to subtract
6 ft 3 3/4 - 5 ft  6in
I like to line up vertically
   6 ft 3 3/4 
- 5 ft  6in
----------------
We  need to borrow 1 ft and make it 12 inches
   5 ft 3+12  3/4 
- 5 ft  6in
----------------
    5 ft 15  3/4 
- 5 ft  6in
----------------  
   0     9    3/4  inches
 
        
             
        
        
        
Answer:2x
Step-by-step explanation: