Answer:
what is the question? it's not clear
 
        
             
        
        
        
50 degrees because 50+50= 100 +80 = 180 and there is 180 degrees in a triangle
        
             
        
        
        
Answer:
4.0541
Step-by-step explanation:
I don't know if this is correct but this is what I got.
You would take the error and divide it by the theoretical value and then multiply that by 100. 
7.7 - 7.4 = 0.3
0.3 ÷ 7.4 = 0.04054054
0.04054054 x 100 = 4.05405405 (simplify) = 4.0541%
Hope I helped in any way
 
        
             
        
        
        
Answer:
x=62
Step-by-step explanation:
1. add + 25 to both sides because when you have a negative you have to add.
2.  When you add 25 to 37 you get 62.
therefore 62 is the answer