Which statement about 159° is correct? A. cos 159° < 0
B. sin 159° < 0
C. tan 159° > 0

The sum of two numbers is 86, and their difference is 20. find the two numbers

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

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.