*Urgent* I need help answering this question. Someone please help me, I keep seeing someone type on my questions but they never get answered. Please help thank you!

How can we find the measure of an exterior angle if we know the measurement of an interior angle

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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.