The answer is 13
Euler's formula:
F + V - E = 2
F - number of faces
V - number of vertices
E - number of edges
We have:
F = 7
V = ?
E = 18
7 + V - 18 = 2
7 + V = 2 + 18
7 + V = 20
V = 20 - 7
V = 13
Answer:
The correct answer is x=2
Step-by-step explanation:
I took the test and it was right. Thank me.
Answer:
The solution set we get is(x,y){(6/4 , 6)}....
Step-by-step explanation:
We have the system of equation:
y = 4x equation 1
8x + y= 18 equation 2
As we see that the first equation has a value of y. Now plug the value of y which is 4x in 2nd equation:
8x+y=18
8x+(4x)=18
12x=18
Divide both sides by 12.
12x/12= 18/12
x= 18/12
x= 6/4
Now plug the value x= 6/4 in equation 1.
y=4x
y=4(6/4)
4 will be cancelled out by 4
y = 6
The solution set we get is(x,y){(6/4 , 6)}....
