What is the coefficient of the fourth term in the expansion of (x + 3)4?

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?