-9 + 12 = Idk this pls tell me thank u

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Select the sequences that are geometric.

Why is partitioning a directed line segment into a ratio of 1: 3 not the same as finding the length of the directed line segment?