Có 5 bạn A;B;C;D;E .Hỏi có bao nhiêu cách xếp 5 bạn vào một ghế dài gồm 5 chỗ ngồi sao cho : a) 5 bạn ngồi bất kì
b) C ngồi ở giữa.
c) Hai bạn A;E ngồi ở hai đầu bàn.

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .