Let $x=5$, $y=\frac{3}{4}$, and $z=-\frac{1}{7}$. What is $$\frac{xz}{y}?$$

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.

Will give a: 122 b: 90 c: 48 d: 180

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.