A music store sells only CDs. The manager buys the CDs for $8.00 each and sells them for $15.00 each. The monthly operating expenses total $10,000. How many CDs must the store sell each month to break even and start making profits?

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) .

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?