Can some one help ill give 50 brain lets after u answer trust pls

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39