The answer to this is 
3(x+1)(x+8)
        
             
        
        
        
Answer: 90º
Step-by-step explanation: complimentary angles are either of the two angles whose sum is 90º
 
        
             
        
        
        
100 is the correct answer
        
             
        
        
        
        
Answer:
Step-by-step explanation:
Sounds as tho' possible answer choices were listed.  Please, share them without being asked to do so.  Thank you.
  7√(x²)          7√(x²)
------------- = ----------------------
   5 √(y³)        5√( y^(3/2) )
We want to get the fractional exponent out of the denominator.  To do this, multiply both numerator and denominator by y^(1/2):
  7√(x²)          7√(x²)                y^(1/2)      7√(x²)·y^(1/2)       7x√y
------------- = --------------------- * ----------- = --------------------- = ----------
   5 √(y³)        5√( y^(3/2) )       y^(1/2)        5 √(y²)                  5y
This is the final answer.  We have succeeded in removing radicals / fractional exponents from the denominator.