Please help me ASAP I’ll mark

Asap 25 pts + brainlest to right/best answer

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy

If f(x)= x^2 - 4 and g(x)=x^2 + 2 x, (b). (f-g)(x) i think i know the 1st 2 steps: f(x)-g(x) x^2-4 - x^2+2x