Katrina buys the two vases shown. How do the volumes of the vases compare ?

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?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.