Directions for constructing the orthocenter of a triangle?

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.

What is not true about kl and mn? what is mn? (show )

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41