Please help this is my last question!! i will give brainliest! links = report

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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