A telephone number consists of seven digits, and the first digit cannot be a zero or a one. How many telephone numbers have no repeated digits?

In the geometric progression –3, 12, −48… what term is 3,072?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant. given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Plz ( true - false) all triangles have interior angles whose measure sum to 90.