Answer:

Step-by-step explanation:
Given the expression

Remove parentheses:  (a)=a

Group like terms

Add similar elements        
 ∵
         ∵ 
Add similar elements        
 ∵
                  ∵  
Thus, the equivalent expression in simplified form:

 
        
             
        
        
        
Answer:
Always.
Step-by-step explanation:
That is the reason why when you are trying to calculate the area of a triangle you do the base x height divided by two or in half. If you printed out the triangle twice then cut it out and put the two together it would be a rectangle.
 
        
                    
             
        
        
        
The answer to the first one is A, the second one is 3.58333
        
             
        
        
        
285 liters is 75.289 U.S. gallons.
        
                    
             
        
        
        
The length of 1 mm is12. 5 ft