Answer:
an odd    an even
Step-by-step explanation:
plz mark as brainliest. my first answer
 
        
             
        
        
        
Well, it depends if its positive or negative. 2 positive integers will equal a positive, 2 negatives will equal a negative. A negative and a positive will depend.
        
                    
             
        
        
        
Answer:
is the difference between highest and lowest values. 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
21 kilometers
Step-by-step explanation:
Let the height be  . Then, the length of the base is
. Then, the length of the base is  . The formula for the area is of the triangle is given by base*height/2. Therefore, the area of the triangle is equal to
. The formula for the area is of the triangle is given by base*height/2. Therefore, the area of the triangle is equal to  , which is in turn equal to 441. Since
, which is in turn equal to 441. Since  must be positive, then
 must be positive, then  , meaning that the height is
, meaning that the height is  kilometers.
 kilometers.
 
        
             
        
        
        
(X+4)(X-4) is the LCD because you just have to look at the denominators and see what factors or values are not already part of your LCD.