How to solve this (Algebra 2)

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.

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29