Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 5 hours. How many hours would it take Kathleen and Anthony to paint both rooms if they work together at their respective rates?
Choose the correct answer: A) 20/7 B) 4/3 C) 15/8 D) 9/4 E) 15/4
(1/2 + 1/5)t=2   t=20/7   20/7nswer: 20/7
<result>A</result>
Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 5 hours. How many hours would it take Kathleen and Anthony to paint both rooms if they work together at their respective rates?