Answer:
 is equivalent to
 is equivalent to  and
 and 
 is equivalent to
 is equivalent to  and
 and  .
.
The expressions which are equivalent to neither:
 and
 and 
Step-by-step explanation:
Given the expressions:
1) 
2) 
To find:
The expressions equivalent to the given expressions.
or the expressions which are not equivalent to any of the given expressions.
Solution:
First of all, let us solve the brackets from the given expressions.
 can be written as
 can be written as  (because when we multiply a negative sign with negative, it becomes positive.)
 (because when we multiply a negative sign with negative, it becomes positive.)
Similarly  can be written as
 can be written as  (because when we multiply a positive sign with negative, it becomes negative.)
 (because when we multiply a positive sign with negative, it becomes negative.)
Therefore, the answer is:
 is equivalent to
 is equivalent to  and
 and 
 is equivalent to
 is equivalent to  and
 and  .
.
The expressions which are equivalent to neither:
 and
 and 
 
        
             
        
        
        
Answer:
54
Step-by-step explanation:
 
        
             
        
        
        
Unknown side = square root (100 - 49)
unknown side = square root (51)
unknown side = 7.14