Find the x-coordinates of the points where the graph crosses the x-axis. y=x3-81x

What is the average diastolic blood pressure for adults

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

Estimate the time en route from majors airport (area 1) to winnsboro airport (area 2). the wind is from 340° at 12 knots and the true airspeed is 136 knots. magnetic variation is 5° east.