i not sure i just need some
Answer:
The sum of the degrees of all the vertices = 8
Step-by-step explanation:
A tree with 5 vertices. N = 5
The number of edges in any tree with N vertices will be N - 1
Using Euler's Sum of Degrees Theorem: Sum of the degrees of all the vertices equals twice the number of edges.
Hence 2(N-1) ==> 2(5 - 1) ==> 2(4) ==> 8
Answer:
144/5
Step-by-step explanation:
Given :
Xinran walks 3 mi/h uphill, 4 mi/h on flat land and 5 mi/h downhill.
To Find :
If he walks one mile uphill, then one mile on flat land and then returns by the same route to his starting point, how many minutes does he walk.
Solution :
Time taken to walk one mile uphill is :
Time taken to walk two mile on flat land( one on going and one or returning ) is :
Time taken to walk one mile downhill is :
Total time taken :
Therefore, time taken un 62 minutes.