How many strings of eight uppercase english letters are there that start with x, if no letter can be repeated?

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.