The supermarket has 28 aisles. 75% are empty, without any shoppers. How many empty aisles are there in the supermarket?

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?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y