Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 7 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 choice:
A) 28/9
B) 4/3
C) 15/8
D) 9/4
E) 15/4
(1/2 + 1/7)t=2   t=28/9   28/9nswer: 28/9
<result>A</result>
Kathleen can paint a room in 2 hours, and Anthony can paint an identical room in 7 hours. How many hours would it take Kathleen and Anthony to paint both rooms if they work together at their respective rates?