For what values of x is l x l greater than or equal to x squared?

This is so hard and it’s for a test

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)