Math 7A Unit 5 lesson 11 Portfolio

I am struggling with math and these are my answer please tell which ones are wrong an explain what I did wrong please.
1C
2B
3C
4C
5D
6C
7B
8B
9A
10C
11B
12C
13A
14B
15D
16C
Please dont judge I guessed on some

for one, there are 38 questions and two, you guessed some of them. but dont worry i need answers too