Junior high classes of 20 students each met in the cafeteria to take achievement tests. If exactly 7 students sat at each table and 20 tables were used, how many classes took the tests?

Robert plans to make a box-and-whisker plot of the following set of data. 27, 14, 46, 38, 32, 18, 21 find the lower quartile, the median, and the upper quartile of the set? lower quartile: 19.5; median: 29.5; upper quartile: 42 lower quartile: 14; median: 27; upper quartile: 46 lower quartile: 18; median: 27; upper quartile: 38 lower quartile: 16; median: 29.5; upper quartile: 42

Explain how you can show five less than a number using algebraic expression

What is the answer to this problem? ignore the work. what is the correct answer?