Help me please I really need help

What is the least common multiple of 16 and 3?

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons