Answer:
4-9=-5
Step-by-step explanation:
do the work you get that
 
        
                    
             
        
        
        
This should be recognized as the difference of perfect squares which is of the form:
(a^2-b^2) and the difference of squares always factors to:
(a-b)(a+b)  in this case:
(3x-8)(3x+8)
        
                    
             
        
        
        
Answer:
B. 5 × 5 × 8
Step-by-step explanation:
Each of the boards have an area of 25. You have 8 of them.
 
        
                    
             
        
        
        
Answer:
centre is 2,-3
radius is 2 units
Step-by-step explanation:
I dont know how to find the equation
above answers are also guesses. 
hope u don't mind
 
        
                    
             
        
        
        
Answer:
half 
Step-by-step explanation: