What is the equation of the plane that contains the triangle shown in the diagram?
CHOICES:
A) 2x + 5y + 4z = 0 (this one was wrong)
B) 2x + 5y + 4z= 1
C) 10x + 4y + 5z = 1
D) 10x + 4y + 5z = 20

I think the answer is B but I'm not sure if I'm working out the formula correctly:

2 - 5 = -3
- 3 + 4 = 1 ???
[URL=http://s790.photobucket.com/user/MoGoYo480/media/Udd_zpsf1f17846.jpg.html][IMG]http://i790.photobucket.com/albums/yy186/MoGoYo480/Udd_zpsf1f17846.jpg[/IMG][/URL]

Question

What is the equation of the plane that contains the triangle shown in the diagram? 
CHOICES:  
A) 2x + 5y + 4z = 0  (this one was wrong)
B) 2x + 5y + 4z=  1
C) 10x + 4y + 5z = 1
D) 10x + 4y + 5z = 20

I think the answer is B but I'm not sure if I'm working out the formula correctly:

2 - 5 = -3
- 3 + 4 = 1  ???
[URL=http://s790.photobucket.com/user/MoGoYo480/media/Udd_zpsf1f17846.jpg.html][IMG]http://i790.photobucket.com/albums/yy186/MoGoYo480/Udd_zpsf1f17846.jpg[/IMG][/URL]

anonymous · Answer

In the diagram below, AC is perpendicular to BD. Find x.

 		18
  		27
  		36  - wrong
  		81

anonymous · Answer

I need step by step instruction in simple terms on how to find x.  I came up with 63 but that wasn't a choice.   
9 - 90 = 81
3 / 81 = 27
2 x 27 = 54
54 + 36 = 90
27 + 36 = 63 <--wrong