(urgent! ) how many terms does 12x + 52a + 96t + 45x + 45 have when simplified? show your work plz thx (i think it is d but idk)

a) 6

b) 4

c) 1

d) 5

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?