What is the lower quartile measure of this box plot? 17 18 18.5 20

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

Student representatives surveyed their classmates on their preference of a school mascot for a new school. the results are shown in the table below. which pair of samples seems most representative of student preference?

What is the midpoint of np if n (1,9) and p (-5-1)