How do you solve this

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) .

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2