A time traveler can take four books with him, and he has 86 books to choose from. How many different ways can the books be selected?

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) .

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?