Since it's an equilateral triangle, all of the angles are the same. Since its perimeter we just need to add. So 3.5+3.5+3.5= 10.5
So the answer is 10.5
        
                    
             
        
        
        
Answer:  3/2
Step-by-step explanation:
Since, two variables are called proportional if there is always a constant ratio between them.
And, The constant is called the coefficient of proportionality or proportionality constant. 
Let x and y are  proportional to each other.
Therefore, x ∝ y ⇒ y=kx
Where k is any constant.
For, x=2 and y=3 k= 3/2 
For, x=4 and y=6, k=3/2
For x=6 and y=9, k= 3/2
Since, here the value of k is constant.
Therefore, k is the coefficient of proportionality. 
And, given table is propositional.
 
        
             
        
        
        
This is a second-order ODE since the highest order derivative is 2 (from 

).
It's not linear because it doesn't take the form

and it's not possible to rewrite it as such.
 
        
        
        
It might be √53 because they are 7 squares away from each other ( I have the same question ) but Im not 100% sure..