Scott is sitting in a movie theater, 21 meters from the screen. The angle of elevation from his line of sight to the top of the screen is 17 degrees , and the angle of depression from his line of sight to the bottom of the screen is 38 degrees . Find the height of the entire screen.

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) .

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18