Now, since I don't want to actually work hard in class, I fail purposely to stay in normal and not advanced. However this is just a algebraic problem with fractions. Add 2/3 to both sides, (I dont know what that gives you) you then have t = whatever. Hope this helpful! :D <span />
        
             
        
        
        
It is 10.7703296143, but estimated it would be about 11. Hope I helped!! :)
        
                    
             
        
        
        
A is independent while b is dependent.
This is because b is equal to a decreased by 2. Anytime a changes, then b does as well. B can only change in accordance with a.
        
             
        
        
        
The perimeter of a rectangle is  (2 lengths) plus (2 widths).
If one side is missing, then it sounds like you still have enough information 
to know what the length and the width are.  Just take each number and use 
the first line up there /\ to calculate the perimeter with them.