1. The heights of 9 students of a class are as follows (in cm): 155, 160, 145, 150, 147, 152, 144 148
a. Find the average height of the students in this class.
b. Is this a sample or a population? Explain
c. What is the mean absolute deviation of this data set?

Find the length of cu, the triangles are similar.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126