Distinct four-letter sequences are formed by picking 5 letter tiles from a bag containing 13 different alphabet tiles. note that the order in which the letters are picked matters. the probability of getting a particular four-letter sequence

Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. shania found the middle number of her scores. which type of measure did she find?

1. are the triangles similar and if so why? what is the value of x? show your work.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?