Calcula la media del ángulo interior y del ángulo central de un poligono regular de a)12 lados b)18 lados c)72 lados d)6 lados

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.

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.