Use the discriminant to determine the nature of the roots of the following equation. x2 + 2x + 5 = 0 double root real and rational root real and irrational root non-real root

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%