Amount of room hannah can paint in an hour = 1/20
amount of room destiny can paint in an hour = 1/16
number of hours = x
1/20x + 1/16x = 1
the reason why this formula is true is, the amount of the room painted in the end should be 1 (the whole room)
4/80x + 5/80x = 1
9/80x = 1
9x = 80
x = 80/9 hours
x = 8.89 hours
Answer:
subtract 3 from both sides
Step-by-step explanation:
I believe it is the first one but I might be wrong.
Answer:
a) 26. b) 13
Step-by-step explanation:
steps are in picture.
Note:If you have any question about it you can ask.