Answer:
a=8 b=6
Step-by-step explanation:
Using the Pythagorean theorem, a^2+b^2=c^2, and in this case, a^2+b^2=10^2 = 100
so a^2+b^2=100
8^2+6^2=100
64+36=100 ✔
and since A is longer than B, a=8, b=6
 
        
                    
             
        
        
        
Answer:
2. 
3. 
Step-by-step explanation:
We add like terms together to simplify
2.  3x²-4x²= -x²     -2x+5x= 3x  6+9= 15  all equal to -x²+3x+15
3.  2x²-3x²= -x²      6x-7x= -x    8+1=9      all equal to -x²-x+9
 
        
             
        
        
        
Answer:
3
Step-by-step explanation:
8.4 ÷ 3 = 2.8
(Hopefully this answers your question)
 
        
             
        
        
        
You are right. Transitivity means, that: 
if a = b and b = c, then a = c 
(here a = x, b=5 and c = y).