To find the nth triangular number you can use this rule:
nth triangular number = " (n + 1)
Example: 4th triangular number =
(4 + 1)
= 10
a)
Find the 12th triangular number.
b)
Find the 50th triangular number.

If lmn=xyz, which congruences are true by cpctc? check all that apply

The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012. based on the data below, assuming that the projected hourly earnings are correct, is jason’s friend’s statement accurate? construction industry - average hourly earnings, 2000-2009 a. his friend’s statement is accurate. the average hourly earnings will increase by 2%. b. his friend’s statement is not accurate. the percent increase will be more than 2% c. his friend’s statement is not accurate. the percent increase will be less than 2% d. his friend’s statement is not accurate. the average hourly earnings will decrease

State if the two triangles are congruent. if they are, state how you know?