A car rental company charges for mileage as follows: 9 dollars per mile for the first n miles and 10 dollars per mile for each mile over n miles. How much will the mileage charge be, in dollars, for a journey of d miles, where d > n ?  Choose the correct answer
A) d-n	B) 6d-n	C) 10d-n	D) 8d-n	E) 12d-n
Total Distance in miles = d   Millage Charge = 9n + (d-n) 10   9n --&gt; For the first n Miles   (d-n)10--&gt; Total no of miles after traveling the first n miles is d-n and the rate after n miles is 10 .   If we solve the equation , We will get 10d-n   Answer : 10d-n
<result>C</result>
A car rental company charges for mileage as follows: 9 dollars per mile for the first n miles and 10 dollars per mile for each mile over n miles. How much will the mileage charge be, in dollars, for a journey of d miles, where d > n ?