20. Reggie can paint a house in 5 hours. Fernando can paint the same house in 6 hours while Mark can do the same job in 3 hours. First, Reggie and Fernando start working together for 2 hours. Then Mark

finished the job alone. How long did it take mark to finish?

rate

time

Total work done

Reggie

Fernando

Mark

24. In a river that flows at 4km/h, a boat takes twice as long to travel 40km upstream as it does to travel

32km downstream At what rate does the boat travel in still water?

Rate

Distance

Time

upstream

downstream

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)

step-by-step explanation:

no solution.