What is the formula to find the the perimeter of 4 sided shape

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.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Which of the functions graphed below has a removable discontinuity?