What is the measure of B, in degrees?

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]