After 5 new zombies invaded the library, there are 31 zombies now in the library. Which equation can be used to find n, the number of zombies in the library before the 5 new zombies joined?​

Asap! i'm not good math and i'm lost.

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.