Here is an example:
Josh bought 7 apples for $21. 
21/7 is 3, so one apple costs $3. This is the unit rate. 
21/7 simplifies to 3/1, that’s another way to think about it. Simplify the fraction until the denominator is 1. 
Hope this helps! Tell me if you have any questions!
 
        
             
        
        
        
--  500  divided by  5 
--  17,684  divided by  58.4
        
             
        
        
        
Answer:
 f(x) = 4 - x
Step-by-step explanation:
'f(x) = blah-blah' is the same as saying 'y = blah-blah', except it is also telling you that the x-y relationship is a function.
I notice that for each case, x + y = 4, so    y = 4 - x
Or in 'function' terminology,                       f(x) = 4 - x
 
        
             
        
        
        
X= tennis balls Noah has
x<8
        
                    
             
        
        
        
Answer:
k=−5
Step-by-step explanation:
−3(k+7)−5k+4=23
(−3)(k)+(−3)(7)+−5k+4=23(Distribute)
−3k+−21+−5k+4=23
(−3k+−5k)+(−21+4)=23(Combine Like Terms)
−8k+−17=23
−8k−17=23
Step 2: Add 17 to both sides.
−8k−17+17=23+17
−8k=40
Step 3: Divide both sides by -8.
−8k
−8
=
40
−8
k=−5
Answer:
k=−5