An easy way to find this is to look at the cross section, and see where the lines meet
Answer:

Step-by-step explanation:
we know that
The Euler's formula state that: In a polyhedron, the number of vertices, minus the number of edges, plus the number of faces, is equal to two

in this problem we have

substitute the given values

solve for V
Combine like terms left side

Adds 6 both sides


Answer:
$0.31
Step-by-step explanation:
Right in the middle of 0 and 1
Y=mx+b
m=slope, b=y-intercept
m=(y2-y1)/(x2-x1), b=value of y when x=0
m=(3--1)/(-2-4)
m=4/-6
m=-2/3, now we have:
y=-2x/3+b, we can solve for b using any point, I'll use (4,-1)
-1=-2(4)/3+b
-1=-8/3+b
-3/3+8/3=b
5/3=b so
y=-2x/3+5/3