Melissa and brian are at the base of a moutain. melissa hikes to a location 27 meters above sea. level brian hikes to a location 21 meters below sea level

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.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?