The domain is the set of values of the x-axys.
As per your description of the function, it goes from negative infinity to positive infinity.
The value would be 5 itself because it is in the ones place. If it were in the tens place it would be 50, if it were in the hundreds place it would be 500, and so on. Hope this helps. Let me know if you need anything else or if I can clarify anything for you, and feel free to post more questions.
It is 46.6666667% 7/15=0.466666667 put into a percent it's 46.6666667%
Why you doing this ur just getting points
It's an open circle because the inequality is greater than but not equal. Then all numbers to the right of -3 on a number line are greater.