What is the distance between points (1, -3, 5) and (-7, 9, -11)?

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

Using elimination, what is -4x+2y=-12 4x+8y=-24

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.