Carl is choosing a four-character password for his
cell phone. The password can contain letters
and digits only, and can't include repeating
characters. How many passwords are possible?

Which matrix multiplication is possible?

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

What is the measure of angle tvu shown in the diagram below