Aclub has 5 members. from these members, the positions of president and vice-president have to be filled. how many different ways can these 2 positions be fille?

In a quadratic function of the form ax^2+bx+c, which of the following is not true? a. the y-intercept is c. b. if a is positive, the parabola opens up. c. the vertex has an x-coordinate of -b/2a. d. the axis of symmetry is the line y=-b/2a.