Does anyone know how to get these I forgot the website for the thingy???

For which rational expression is -2 an excluded value of x?

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?