Apen holder contains 12 identical pens, 6 of which do not write. a child randomly selects a pen, replaces it, and selects again. find the probability that both pens do not write. (enter your probability as a fraction.)

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?