Anybody know this ? please help :(

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

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

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)