Question

(this is 6th grade math)
Please help I don't
know these​

Answer 1

H: 4x + 28.
O: 2x - 2
N: -5x + 45
D: -3x - 27

5: -3x - 27
12: -5 + 45
3: 4x + 28
7: 2x - 2

Answer 2

There are to many questions for me to answer but I would recommend using Khan Academy.

Explanation:

Khan Academy has literally anything you need to know on it. I'm greatly sorry I wasn't of any help but even I still struggle with these.