Is a degree and a + 20 degree are complementary angle find a degree

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.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2