Completen el siguiente cuadro referido a las personas que utilizan el ascensor en un edificio. Sube en el piso - 2 Viaja en el ascensor Baja en el piso 7 pisos para arriba 4 6 pisos hacia abajo 5 pisos hacia arriba 3 8 pisos hacia abajo - 2 9 0 - 3 7

Me answer number 3plz explain how you do it

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.