Answer:
39
Step-by-step explanation:
The short answer is 39. 
Every triangle has 180 degrees. There are no exceptions to this rule.
Since a triangle has 3 angles, all three together must add up to 180o
A right angle = 90 degrees always.
You are given 51 degrees as your second angle
The third one is x
x + 51 + 90 = 180                   Total of three angles must be 180
x + 141 = 180                           The left has been added to give 141
x = 180 - 141                            Subtract 141 from both sides
x = 39                                     The third angle = 39    
 
        
             
        
        
        
Answer:
look at the pictures
Step-by-step explanation:
HOPE THIS helps
 
        
             
        
        
        
Answer:
3. 3/2
4. -1/3
5. -3.5
6. -6and 2/3
7. -18and 13/24
8. 1/18
9.-2.6
10.-1.83
11. 14.963
Step-by-step explanation:
HOPE THIS HELPS, if not see me in the comments
BRANILIEST PLZZZ
 
        
             
        
        
        
Answer:
(g+3)(g-3)
Step-by-step explanation:
square root of g squared is g
square root of 9 is 3