PLS HELP
f(1) = -6
f(2) = -4
f(n) = f(n - 2) + f(n - 1)
f(3) =

Amonument at a park is in the shape of a right square pyramid. a diagram of the pyramid and its net are shown. what is the surface area of the monument? enter the answer in the box. m²

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

What is the least common multiple for 6 and 8? what is the least common multiple for 4 and 12 ? what is the least common multiple for 11 and 12? what is the least common multiple for 3 and 6?