50% = 1/2
1/2 of 400 is 200
200 students bring their lunch.
The area of a triangle is:
A=hb/2 where h=height and b=base
We can let the "height" be the horizontal magnitude, (x3-x1)
And the base would then be the vertical magnitude, (y2-y1)
So the area is:
A=(1/2)(y2-y1)(x3-x1)
Answer:
Step-by-step explanation:
X. 2 2 -3
-4 -6 2