4 students took the spelling quiz. The mean of their quiz scores is 15. A fifth student took the quiz and scored 10. What is the new mean of the five scores?​

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Based on the diagram, match the trigonometric ratios with the corresponding ratios of the sides of the triangle. tiles : cosb sinb tanb sincposs matches: c/b b/a b/c c/a

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0