Answer:
a > -2
Step-by-step explanation:
-12a +7<31
Subtract 7 from each side
-12a +7-7<31-7
-12a <24
Divide by -12, remembering to flip the inequality
-12a/-12 >24/-12
a > -2
 
        
                    
             
        
        
        
Answer:
x=6
Step-by-step explanation:
I hope it's helpful
 
        
                    
             
        
        
        
Answer:
O is the center of the circle with radius IE(=ID=EF)
Step-by-step explanation:
Join all 3 points D, E, F, forming the triangle DEF.
Let the midpoint of EF be M and the midpoint of ED be N. (first picture)
Join point I to E, D and F.
Since IN is both an altitude and median to triangle EID, then triangle EID is an isosceles triangle, and IE=ID
similarly, we see that IE=IF.
conclusion: IE=ID=EF.
 
        
                    
             
        
        
        
Answer: you can use desmos and type it in just like that a graph will pop up. Go to google and type in desmos 
Step-by-step explanation: