Dana measured the mass of 20 soil samples for a gardening study. After measuring the first 10, she
realized she had forgotten to zero the balance. She did that and then measured the other 10 samples.

a

step-by-step explanation:

x-3y=4

step-by-step e

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)