What is the expression 1/3b-1/3 factored?

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.

How do you write 600 as a product of its prime factors (index! )

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =