This one depends on what you have been told -- somewhat anyway.
I'm using the term "mark" to mean click on the square to fill it in. The square is in front of the choice.
I'd mark the first one along with the second one.
Leave the 3rd one blank. It is not an exponent.
I would say the 4th one is true. If you remove the brackets, it would be termed a common factor, so you should call it a factor before removing the brackets.
Mark (click) on the 4th one.
I think that 9 is a constant. Just a minute, I see what google says. It agrees. It is a constant.
Don't check the last one. It is a coefficient.