Find the perimeter of the figure shown on the right. Express it as a polynomial in descending powers of the variable x

What is the solution to the inequality

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site