What is the measure of angle 3 a.39 b.78 c.102

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.