Answer:
(n/3)-10=6
Step-by-step explanation:
Let n be the number
Quotient of n and 3 is n/3
10 less that this is (n/3)-10=6
 
        
             
        
        
        
5!/2!=120/2= 60 arrangements
        
             
        
        
        
I gotchu bruh.
Equilateral triangles got 60 per angle
Add 60 to that one next to 100 so you got 160 and the other triangle is iscosles so the equation is 
160+60+60+x+x=360
2x=80
X=40
        
             
        
        
        
Answer:
y=11.142857
Step-by-step explanation:
Simplify 5.2/3.5 to 1.485714
1.485714=y/7.5
Multiply both sides by 7.5
1.485714× 7.5=y
Simplify 1.485714×7.5 to 11.142857
11.142857=y 
Switch sides
y=11.142857