| Giver | Post | Date |
| studentsensual | Re: In the xy-plane, region R consists of all the points (x, y) | 19-Feb-2016 |
| Dienekes | Re: In the xy-plane, region R consists of all the points (x, y) | 26-Dec-2015 |
| angierch | Re: In the xy-plane, region R consists of all the points (x, y) | 09-Nov-2015 |
| shasadou | Re: In the xy-plane, region R consists of all the points (x, y) | 13-Aug-2015 |
| Bunuel | Re: In the xy-plane, region R consists of all the points (x, y) | 02-Jun-2015 |