I think of a number, half it and subtract four

Ablock of wood is a cube whose side is x in. long. you cut off a 1-inch thick piece from the entire right side. then you cut off a 3-inch thick piece from the entire top of the remaining shape. the volume of the remaining block is 2,002 in3. what are the dimensions of the original block of wood?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?