Layna can paint a 350-square-foot room in 4 hours. It takes Bebe 7 hours to paint the same room. Which equation can be used to find t, the time it takes Layna and Bebe to paint the room together

He amount of work done by Layna every hour is 1/4 and that of Bebe is 1/7. These are all dependent on their rates to do the job alone. After working for t hours, they will accomplish 1 job. Thus, this is shown in the equation,

(1/7 + 1/4) x t = 1

Solving for t gives an answer of 2.55 hours.