What is the answer to this equation 1/2+p=-3

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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?

Someone me what is the area of this figure? 18m 18m 8m 16m