Use the rules of exponents to evaluate and simplify the following expression. (x*y)^-3

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)