Question

Question 38

A simple connected graph with 7 vertices has 3 vertices of degree 1, 3 vertices of degree 2 and 1 vertex of degree 3. How many edges does the graph have?

Question 29

Use two of the following sets for each part below. Let X = {a, b, c}, Y = {1, 2, 3, 4} and Z = {s, t}. a) Using ordered pairs define a function that is one-to-one but not onto. b) Using ordered pairs define a function that is onto but not one-to-one.

Question 3

Consider the following statement: For all integers n, if n is odd then n is odd. 3 Prove the statement by Contraposition. Clearly indicate what you would “suppose” and what you would “show” to prove the statement.

Question 46 What is the second term of (2x^2 ‑ 3y)^6? Your answer should be in the form (sign)(numerical factors)(actual powers of variables).

Answer 1