Answer:
140x12+105x4+55x12= 86,340 a month
Step-by-step explanation:
 
        
             
        
        
        
First you need to set up an equation y = mx + b. m would be the monthly charge and b would be the one time fee. x represents the number of months.
To solve for the number of months with a total price of 240 we substitute 240 in for y and solve for x.
240 = 25x + 40
subtract 40 from each side
200= 25x
divide by 25
8 = x
8 months
10 + 7r = 45
7r = 35
r = 5
5 miles
        
             
        
        
        
Answer:
Yes, as the change in y repeats continuously