Anyone know the answer

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Complete this sentence with the best of choices given

The soccer team is conducting a fundraiser selling long-sleeved t-shirts for $14 and short-sleeved t-shirts for $10. so far the team has sold less than $200 worth of the two types of t-shirts. which inequality best represents x, the number of long-sleeved t-shirts they have sold, and y, the number of short-sleeved t-shirts they have sold?