Step-by-step explanation:
hope you get idea of graphing the four lines
Your answer would be A :)
Answer:

Step-by-step explanation:
Use trigonometry
Recall that cos(x)=adjacent side/hypotenuse
You can remember this with SohCahToa
Also remember that if cos(x)=y then 
In this case, we know the adjacent side and hypotonous
Adjacent side=5000
Hypotenuse=13000
Therefore

Now to solve for x, take the inverse cosine

-4<em>n</em> ≥ 12 ==> <em>n</em> ≤ -3
<em>n</em> + 5 > 2 ==> <em>n</em> > -3
But <em>n</em> cannot be both less than/equal to -3 AND greater than -3, so there are no integers <em>n</em> that satisfy these inequalities.
Answer:
Right Triangle.
Step-by-step explanation:
A right triangle always has a 90 degree angle.