Here’s how you would work it out
Answer:
Yes.
Step-by-step explanation:
If a graph G doesn't have a circuit, we must have that

where
is the number of edges of the graph and
the number of vertices. However, in this case it holds that

See the attached picture for the answers:
Answer:
maximum 5 CDs
Step-by-step explanation:
Let Mitchell can order a maximum of x CDs
It has been given that each CD costs $15.99, and shipping for the entire order is $9.99.
Thus, we have the total cost for x CDs

Now, Mitchell has no more than $100 to spend. It means

Subtract 9.99 to both sides

Divide both sides by 15.99

Hence, Mitchell can order maximum 5 CDs