27. tell whether the sequence is arithmetic. if it is, what is the common difference?

-15, -9, -3, 3, . .

a. yes; 3

b. yes; 5

c. yes; 6

d. no

Atravel agent is booking a trip to england, scotland, ireland, and france for a group of senior citizens. the agent sent surveys to the group, asking which countries they would like to visit, in order, and created the shown preference schedule (e = england, i = ireland, s = scotland, f = france). which country is the condorcet winner? number of votes 15 12 16 19 1st f e e i 2nd e s i s 3rd s i s e 4th i f f f 1. scotland 2. england 3. france 4.ireland