This is complicated- what is 3x + (-2x)?

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

What is a rational number between 9.5 and 9.7

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?