There are 256 cups of water needed. I hope this helped.
        
             
        
        
        
If we treat  b sliding vector, then head of green vector coincide with tail of b vector. So,in this Senior a is acting as a resultant vector. To get this resultant  vector a, the green vector must be a-b.<span />
        
             
        
        
        
Answer:
One of the below.
Step-by-step explanation:
12-2=10      2+x=12    
 
        
             
        
        
        
Answer: Angle 4
Step-by-step explanation:
The angle of depression is formed by the line of sight and the horizontal line tangent to the top of the observer.
 
        
             
        
        
        
Make variables for each
L = library books
P = telephone books
T = text books
so.... L+P = 2T 
now we have to fill in numbers