Calcula el m. c.d de los casos que se solicita.  465, 744, 837, 2511
 171, 342, 513, 684
 840, 960, 7260, 9135
 54, 76, 114, 234

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm