What type of polygon is formed by drawing segments connecting the non-point vertices of an N-pointed star as in the example at the left?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Find the greatest common factor of the polynomial: 10x^5+15x^4-25x^3 10x^5 x^3 5x^3 5

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