Determine the total number of different ways to select 4 Class Officers, President, Vice-President, Secretary, and Treasurer from a list of 10 candidates.

F(x) = x2 − 9, and g(x) = x − 3 f(x) = x2 − 4x + 3, and g(x) = x − 3 f(x) = x2 + 4x − 5, and g(x) = x − 1 f(x) = x2 − 16, and g(x) = x − 4 h(x) = x + 5 arrowright h(x) = x + 3 arrowright h(x) = x + 4 arrowright h(x) = x − 1 arrowright

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?