You have the answer: 4, 11, 21. Negative dimensions do not exist in the real world.
I think you need to add the units to make it 4cm, 11cm, 21cm
Привет. So, you are Russian?
Do you have a calculator?
1.09
Checkout this site:
https://www.symbolab.com/
It shows problems step by step and you can find practice.
I am hoping for my family to be well and America too. Also. when you get older, you'll realize that present, themselves, aren't really that important. There will at least be some presents and that's fine.
Are they already answered?
I can answer this when I can access the links in an hour and a half or you can upload images now.
A reflection across y = -x is basically across both axis. So, just change the sign for all of the points.
This site really helped me do this:
https://www.desmos.com/calculator
+228 