The burj khalifa a building in dubai united arab emirates is about 828 meters tall

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

Which expression gives the exact value of x?