Alot points so ! the fare on a railroad is 40 cents for every mile of travel, plus an additional $15. write an expression for the cost, in dollars, of a trip of n miles. tell me the correct answer and how you got it step by whoever does this will get the ! no fake

F(n) = $15+$.40n

f(n) means the function as it applies to n miles
$15 is your base fare
40 cents becomes $.40
You pay $.40 per mile so that is $.40n
And it is $15 plus the $.40 per mile so you have $15+$.40n
When you put that all together it is:
f(n)=$15+$.40n

Hope that helps.  Feel free to ask any questions.