If the vertex of a parabola is left parenthesis negative 8 comma 4 right parenthesis, what is the axis of symmetry?

Which of these choices show a pair of equivalent expressions?

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.