Answer:
Step-by-step explanation:
(a). B, C and D are the distinct points that are collinear.
(b). FC and BD are the distinct lines that intersect each other at a point C.
(c). E, F, C and A are the points that are coplanar (on the same plane).
(d). Another name for plane X is plane AEF. (Since a plane is defined by the three distinct points on the same plane.
Answer: 5+5+12+12
Step-by-step explanation:
By the fundamental theorem of algebra, we can write
Expanding the right hand side, we get
We want 
to be an integer, which means 
must also be integers. This means must be factors of 10. There are several possibilities:
So there are 4 possible values for : -11, -7, 7, and 11.
The answer is 12.55 I think
