Vector operations: so I need help to know when one is true or false.
The x-component of a vector can be (+),(-), or zero
A × C = C × A
The scalar (or dot) product of two vectors can be (+),(-), or zero
If A is perpendicular to B, then B • A = 0
The magnitude of a vector is always positive or zero.
If A = B × C and C = 16j, then Ay =0

thanks,

susus, copying and pasting doesn't work very well here. You'll need to repost your question, typing it in manually. Otherwise, your question is unreadable.

Also, you'll need to show some work on your part so we know you're actually trying. We're here to help, not to do your homework for you. What do you think the answers are and why?

If I understood well, there are 3 statements?

The x-component of a vector can be (+),(-), or zero
A × C = C × A

The scalar (or dot) product of two vectors can be (+),(-), or zero
If A is perpendicular to B, then B • A = 0

and

The magnitude of a vector is always positive or zero.
If A = B × C and C = 16j, then Ay =0

?

If so, then I'd ask you to say what you think are true and which are false. You should know by now how asking homework questions work...

I just want to tell you that in my physics course which is 8 points, I got 99/100, and I want to thank you, for letting me think , and because you never just gave me the answers .
I really worked hard for that score. Thanks.
I will try again and then submit my answer