Answer:
3.
Step-by-step explanation:
15 - 12 = 3.
The ends of the box are the lower and upper quartiles.
The difference  upper - lower = the interquartile range.
 
        
             
        
        
        
Answer:
4d+24
Step-by-step explanation:
The distributive property says that 4(d+6)=4d+(4)(6)
which simplifies to 4d+24
(I hope that's what you needed, please lmk if you needed more than just simplifying.)
 
        
             
        
        
        
1/3
Reduces los números usando el máximo común divisor= 2
        
             
        
        
        
Answer:
W is not a subspace.
Step-by-step explanation:
Notice that (-1,2,2) and (-1,5,3) are both elements of W. Because its x coordinate, x = -1, satisfy the condition |x| = 1.
but (-1,2,2) + (-1,5,3) = (-2,7,5) do not belongs to W. Because its first coordinate, x =-2, do not satisfy |x| = 1.  
 
        
             
        
        
        
If the 2 given points are endpoints, then we're in business.  The formula for the midpoint is 

.  If the endpoints of our segment are the coordinates (1,2) and (12,14), our formula would be filled in as follows: 

 which simplifies to (13/2, 8).  See?  It's pretty simple once you know how to do it.