When aaliyah picks any number between 1 and 20, doubles it, adds 6, divides it by 2 and subtracts 3, she always gets the number she started with.

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

Which of the following three dimensional figures has a circle as it’s base

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?