Colllect like terms 21b+b= (simpify answer)

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Find the cosine function that is represented in the graph.

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship