Question Sarah’s mom took 3 hours to clean, but when Sarah helped, it took them 2 hours to clean. How many hours will it take Sarah to clean herself?

Answer: It takes them 1.875 hours. Step-by-step explanation: Here, the job is cleaning the house. Mom does 1 job in 3 hours. In 1 hour, mom does 1/3 of the job. Dad does 1 job in 5 hours. In 1 hour, dad does 1/5 of the job. Mom and dad working together do the job in x hours. In 1 hour, mom and dad together do 1/x of the job. 1/3 + 1/5 = 1/x 5/15 + 3/15 = 1/x 8/15 = 1/x 8x = 15 x = 15/8 = 1.875 Answer: It takes them 1.875 hours. your welcome Log in to Reply

Answer:It takes them 1.875 hours.Step-by-step explanation:Here, the job is cleaning the house.Mom does 1 job in 3 hours.In 1 hour, mom does 1/3 of the job.Dad does 1 job in 5 hours.In 1 hour, dad does 1/5 of the job.Mom and dad working together do the job in x hours.In 1 hour, mom and dad together do 1/x of the job.1/3 + 1/5 = 1/x5/15 + 3/15 = 1/x8/15 = 1/x8x = 15x = 15/8 = 1.875Answer: It takes them 1.875 hours.your welcome