Which expression represents the distance between point (0, a) and point (a, 0) on a coordinate grid?

Find the roots of the equation below. x^2 - 6 + 9 = 0

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take