Answer:
See below, I will let graphing part to yourself.
Step-by-step explanation:
First function: domain:  , range:
, range: ![(-\infty, -2]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%20-2%5D) , decreasing
, decreasing
Second function: domain:  , range:
, range:  , increasing
, increasing
Third function: domain:  , range:
, range:  , increasing
, increasing
 
        
                    
             
        
        
        
Question 10: P=28cm
if l=8 and w=6
Then (8+6)=14
2(14) so 14x2 = 28
So therefore P=28cm