Write a function for the nth term of this arithmetic sequence. 15,19, 23, 27

Then find the 23rd term.

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

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

Are the corresponding angles congruent? explain why or why not.