Answer:
-2b/(a-b)
Step-by-step explanation:
 1− (a+b/a−b)
We need to get a common denominator of a-b
1 = (a-b)/(a-b)
Replace 1 with (a-b)/(a-b)
(a-b)/(a-b) - (a+b)/(a-b)
Put over the common denominator
(a-b) - (a+b)
-----------------
(a-b)
Distribute the minus sign.
(a-b) - a-b)
-----------------
(a-b)
a-a-b-b
---------------
a-b
-2b
----------
a-b
 
        
             
        
        
        
B.) 14/43 
1&2 =7+7
= 14
Bottam:
14 + 8 +6 + 9 +6
= 43
Lastly
= 14/43
        
             
        
        
        
Answer:
B:subtraction property
Step-by-step explanation:
 
        
             
        
        
        
True. 
two angles would be complementary if the sum of their angle measures is 90 degrees. 
60 degrees and 30 degrees make a complementary angle while 90 and 90 degrees make a supplementary angle.
        
             
        
        
        
The answer is 7 3/4 inches. 
I noticed the word "train" in the problem and I knew I had to help you! :)