Can someone fill this out please

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.