Students log on to the California Virtual Campus with a user name consisting of eight characters: four uppercase letters of the alphabet followed by four digits. How many user names have no repeated letters or digits?

Ernest is purchasing a $175,000 home with a 30-year mortgage. he will make a $15,000 down payment. use the table below to find his monthly pmi payment.

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*