Answer:
Step-by-step explanation:
It is given that 
and 
is in the fourth quadrant.
So, only 
will have positive value and 
, 
will have negative value.
Now,
⇒ 
(Answer)
We know, that 
⇒ 
{Since, is positive then 
will also be positive}
⇒ 
(Answer)
We know, that 
⇒ 
{Since, is negative then 
will also be negative}
⇒ 
(Answer)
Answer:
AB is parallel to BE because it is an equilateral triangle.
BE is parallel to EC because it has 2 of the same angles to the same sides are equal.
Hope that helps, it's a tad hard to explain
Answer:
It is either C or D.
Step-by-step explanation:
Your answer is xy-1<span><span>
</span></span><span>=<span><span><span><span>4<span>x2</span></span><span>y2</span></span>−<span><span>4x</span>y/</span></span><span><span>4x</span>y
</span></span></span><span>=<span><span><span><span>4x</span>y</span>−4/</span>4
</span></span><span>=<span><span>xy</span>−<span>1
</span></span></span>Hope this helps!
Let's assume the laptop is opened at 90 degrees (this is done for the sake of simplicity, is actually irrelevant) then each plane would be analogous to the 'x' and 'y' planes you see in a Cartesian Plane, which only intersect at one point called the Origin. Any two lines with different slopes will intersect only one time (if they're parallel they have the same slope)
