Ineed answer and specific explanation

If g(x) is an odd function, which function must be an even function?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?