Answer:n=-2 or n=4
Step-by-step explanation:
Q is not inversible if det(Q)=0

 
        
             
        
        
        
Narrowing it down it's either a or c because the other 2 choices open downward (negative a).
Graphing the 2 parabolas choice c is narrower.
c
        
             
        
        
        
Answer:
The radius is half of the diameter of the circle and it is measured from the center of the circle to the circumference of the circle.
Step-by-step explanation:
 
        
                    
             
        
        
        
We must solve   <span>2/5 ≥ w -3/5.  Note that w is already +, so leave it where it now is.  Add 3/5 to both sides of this inequality:
2/5 + 3/5 </span>≥ w  - 3/5 + 3/5
Then:  1 ≥ w, or w ≤ 1  (answer)