If creating a bracelet with 1 red bead, 1 blue bead and 1 white bead, how many possible way can i arrange the beads?

What is the value of x? enter your answer in the box. photo attached.

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Average acceleration: i have no idea how to do this.