2X. (3x - 2y + 4z) con proceso porfavor, ayuda

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) .

Multiply. write your answer in simplest form. 3/8 x 5/7

Ill mark the brainliest if you me with the these three questions 7,8,9