28. algebra in three months, harold
watched a total of 40 movies. if he
watched 12 movies in june and 13
movies in july, how many movies did he
watch in august? write an equation using
the variable a to model your work.

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) .

Write an equation for the function that includes the points (2,100)and (3,100)

What is the point slope form of a line with slope -5 that contains point (2,-1)