The answers we have available are located on the Resource tab of the FlexBook. Make sure you are clicking the Resources tab when viewing the Table of Contents for the whole book, not the Resource tab for each individual chapter. You will find a file either in pdf or word doc format for download. Note that not all FlexBooks have answer keys, though most do. Also, if there is a teacher's edition for a FlexBooks, answer keys may be on the Resource tab for *that* book instead.