Suppose there is a right triangle with 2 legs of 6cm and 9cm long. what is the measurement of the hypotenuse?

Plz which expression is equivalent to the expression below?

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.

Given abc find the values of x and y. in your final answer, include all of your calculations.