Please help, thank you.

What point(s) are 100 units away from point -1?

Which system of linear inequalities is represented by the graph? !

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points