What is the answer to these question
1: 1/3y-1/2=5
2: 5n+1/2=1/6

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.

Can someone me with this problem i don't understand i need

Is the figure congruent? yes or no?