Show example for problem. 4(d+2) = what?

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

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement