So Jada for 1 day, gets charged $30 flat now, she drove 2 days, so...she's charged 2 * 30 or 60 bucks plus the mileage
is 0.5 per mile.... so... 1 mile is 0.5 2 miles 2 * 0.5 3 miles 3 * 0.5 4 miles 4 * 0.5 5 miles 5 * 0.5 x miles x * 0.5
she drove "x" miles, whatever that is we also know, her total cost in the end, was 360 so... those 360 include the 2 days charge, 30 * 2 plus the mileage, x * 0.5 or 0.5x so... one can say that