Anyone wanna help me LOL ??

11. #1 90 degrees

    #2 45 degrees

    #3 45 degrees

    #4 90 degrees

12. 6x-21 = 45

    add 21 to both sides

    6x= 66

    Divide by 6

    66/6=11 so x=11

13.  Rectangle and square I think

14.  All of them

15.  Square and rhombus

16. All of them

table 3 represents a direct variation function. : )

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)