Need help what is the answer, please. I am so confused

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To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Which shaded region is the solution to the system of inequalities? y y[tex]\geq[/tex]-x+1