Ineed questions 3 and 7 i don't wanna get killed by my teacher

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) .

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

What is 140% of 25? because i need