Hello, we know that for a and b real numbers

So,

Thank you.
 
        
             
        
        
        
Answer:ahhhh
Step-by-step explanation:
I hope this helps
 
        
             
        
        
        
That would be evaluated to 31+1 because you have to keep change flip. Keep the 31, change the symbol to addition, then flip the negative 1 to a positive number.
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
I still suspect that Angle A is 30° and Angle B is 60°.  Otherwise the labels do not fit the illustration.
If Angle A is 60°, as you insist, then the solution (the length of x) is as follows:
                           opp side        x
tan 60° = √3 = ---------------- = -----
                           adj side          7
Then:
    √3            x
-----------  =  -----
      1              7
Thru cross-multiplication we see that x = 7√3
Multiply both sides by 7, which produces:
7√3 = x