Question 951294
Jess rakes 1 lawn/50 min=1/50 lawn/min
Tate rakes 1 lawn/30 min=1/30 lawn/min
Together they rake 1/50 lawn/min + 1/30 lawn/min=(3/150 + 5/150)lawn/min=8/150 lawn/min.
1 lawn /8/150 lawn/min=18.75 min
ANSWER: Together they can rake the yard in 18.75 minutes.