Melinda is running in gym class. she has 45 minutes and needs to run 6 miles. write an inequality to find the amount of time she can spend running each mile

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.