Answer:
2 hours and 24 minutes
Step-by-step explanation:
cynthia can wallpaper a room 4 hours with means in 1 hour she can wallpaper 1/4th of the room, her brother can wallpaper the same room in 6 hours so I'm 1 hour he can wallpaper 1/6 of the room.
okay , attach a file .
2 20/24
divide 4/2=2
then do 5/8÷3/4=5/8×4/3=20/24
u basically inverse 3/4
f(x) = -1/x+5 +2
