Answer:
It can be solved in many forms 
one by replacing each point to see which one satisfy the equation or by using quadratic formula
so the right answer is the fourth one
 
        
             
        
        
        
Answer:
(x - 1) x (5x + 4) 
Step-by-step explanation:
5 x 2 – 4 = 6
5 x 4 – 4 = 16  
6 x 2 – 11x – 4 = 56    
5 x 2 – x – 4 = (x - 1) x (5x + 4)
 
        
             
        
        
        
Answer:
C≈51.84in
Step-by-step explanation:
C=2πr
d=2r
Solving for C
C= πd= π·16.5≈51.83628in
 
        
             
        
        
        
Answer:
X = 8√2.
Step-by-step explanation:
In a 45-45-90 triangle the ratio of the sides are x:x:√2 x.
So here, x = 8 and the side X = 8√2.