Find the distance of line ab if a(3,5) and b(-3,-3)

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2