What value of x will make the sides equal

3x+94 = 21+94

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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) .