I have to find the perimeter of the polygon with the given vertices. And I have to round to my answer to the nearest hundreth.​

Ily begins solving the equation 4(x – 1) – x = 3(x + 5) – 11. her work is shown below. 4(x – 1) – x = 3(x + 5) – 11 4x – 4 – x = 3x + 15 – 11 3x – 4 = 3x + 4 how can her partial solution be interpreted?

What is the value of x when x + 7 = 21?

Which system of linear inequalities is represented by the graph?