What is the extraneous solution? 2/x^2-1 -1/x-1 = 1/x+1

Solve for x, y, and z. show all steps.

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?