Answer:
t = d/S
Step-by-step explanation:
S = d/t
Cross multiply 
S x t = d
Divide both sides by S
S/S x t = d/S
t = d/S
 
        
             
        
        
        
Answer:
8 Km
Step-by-step explanation:
16 x 50000 = 800,000 cm
800,000 cm = 8,000 m
8,000 m = 8 km
I hope this helps, if not sorry
 
        
             
        
        
        
I don't see any green dot, sorry. 
 
        
             
        
        
        
Answer:
The difference of squares is (a - b)(a + b) = a² - b². Since a = x and b = 2, the answer is x² - 4.