Mark is four years older than his sister, sadia. sadiais p years old. what is mark's age?

Find the area of the regular hexagon if a side is 20 cm.

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

There are 8 movies that you would like to see currently showing in theatres. in how many different ways can you choose a movie to see this saturday and one to see this sunday?