Hey i know this is in the math category but I posted a question on English can someone PLEASEEE go try it out I need help asap

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

Which statements about these triangles is true

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1