Jonathan can type a 20 pages document in 40 minutes, susan can type it in 30 minutes. jack can type it in 24 minutes. working together, how much time will it take them to type same document?

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.