Answer:
1. always
2. sometimes
Step-by-step explanation:
Two lines are coplanar if they lie in the same plane or in parallel planes. There is ALWAYS a plane which contains two parallel lines (see first attached image for details).
Two lines that lie in parallel planes are sometimes parallel. For example, see at second image. Planes 
and 
are parallel. Consider pair of lines 
and 
- they are parallel, but if you consider the pair of lines and 
, you can see they are not parallel.
Answer:
use this
Step-by-step explanation:
velocity = distance / time…. So distance = velocity x time
To simplify the expression we are going to use the distributive property of multiplication:
.
We can infer from our problem that
,
, and
. So lets apply the property to simplify our expression:
We can conclude that the correct answer is <span>
-8x3 + 6x2</span>
There is one<span> last step after getting </span>x<span> = </span>3<span>. You must check </span>x<span> = </span>3<span> in the original equation to be sure that </span>x<span> = </span>3<span> does not cause a zero denominator.</span>
