Answer:
n=6
Step-by-step explanation:
(n-18)/3 = -4
multiply by 3
n-18 = -12
add 18
n = 6
 
        
                    
             
        
        
        
25 metres. Because 1/10th of a kilometre is a 100 metres. And four athletes divided by 100 metres is 25 metres.
        
                    
             
        
        
        
PYTHOGOROS THEROEM :- 
ITS LIKE:- AC² = AB² + BC²
 
        
             
        
        
        
Answer:
A) 147.6 sq m
Step-by-step explanation:
Separate the pyramided out into 4 triangles and add those
3 of them (sides) will be the same

This is one half of the side, multiply by 2 to get the area of the entire side, 40 square m.
The area of all 3 sides together is 40*3 = 120 sq m
For your base, your height will be 6.9 and your base is 4
A = 13.8  sq m
multiply by 2 again for the entire base
A=27.6 sq m
Now add both
120 + 27.6