Rewrite f(x)=2x+3/x+6 in the form f(x)=a/x−h+k

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).