Answer keys and help can be found here (will be updated as I add more; please let me know if you want me to work out any of them)
- Algebra 1 #90 http://edcr8.co/IfYaoe
- Geometry #90 http://edcr8.co/J0oqiL
- Geometry #91 http://edcr8.co/J0olvD
- Geometry #92 http://edcr8.co/J0olM1
- Algebra 2 #39 http://edcr8.co/IgZ2VT