Answer:
6 hours
Step-by-step explanation:
First set up the equation. Seeing the word "per", we know that this will be the variable. The repairman charges an initial fee of 37.50, so we add that fee to the total cost of every hour. To find how much Robin can spend, you set it equal to 450
65x + 37.50 = 450
Now subtract 37.50 from both sides because neither number has a variable, so you can subtract them to simplify the equation
65x = 412.5
To isolate x and find what it's equal to, divide both sides by 65 to get rid of the coefficient.
 x = 6.34.
However the answer should be 6 because robin cannot afford a full or part of a 7th hour 
 
        
             
        
        
        
1 mile=5280 feet
5 miles=5 times 5280=26400 ft
        
             
        
        
        
The other coordinate B is = (-4,-4)
        
             
        
        
        
use one five dollar box then use 4 4 $ boxes then its five dollar boxes the rest of the way so it would be 59 5$ boxes then Four 4$ boxes
 
        
             
        
        
        
Could you show a picture so i could understand a little bit better?