Write a real world problem that can be solved by using 7x+6=55

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

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

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?