Is x = 4 a root of the polynomial function f(x) = 23 – 22 – 8x +12?

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.

Which of the choices shown could be used to prove that aacp=abcp ?

Plot the intercepts to graph the equation