9 x 15 = ( 9 x 9) + (9 x 15)
        
                    
             
        
        
        
In 1 minute the copy machine copies = 24
That means 
In 60 seconds the copy machine copies = 24
First we need to convert 5 minutes and 30 seconds to seconds
Then
5 minutes and 30 seconds = (5 * 60) + 30
                                           = 300 + 30
                                           = 330 seconds
So
In 330 seconds the copy machine will copy = (24/60) * 330
                                                                     = 4 * 33
                                                                     = 132
So in 5 minutes and 30 seconds the copy machine will copy 132 copies.
        
                    
             
        
        
        
Word form: 
Two and seven hundred eighty-nine thousandths 
Expanded form:
 2 
+ 0.7
+ 0.08
+ 0.009
        
                    
             
        
        
        
Yes, because there are zeros after the 8. 0.8 miles is equal to 0.80 miles, which is larger than 0.69 miles
        
                    
             
        
        
        
Hello,

You have just to read the arrows un reversed order:
in f we find (-1,-3)  so in f^{-1} we find (-1,-3)^{-1}=(-3,-1)