I'm not sure if this was answered before but I will ask just in case, NO LINKS. Must all measures of center appear as a number in the set of data collected? A.
All the measures of central tendency have to be numbers in the set of data.

B.
All the measures of central tendency are never numbers in the set of data.

C.
The mean and median may or may not be in the set of data, but the mode is always in the set of data.

D.
The mean and mode may or may not be in the set of data, but the median is always in the set of data.

john got lost so he didn't know what to do and it was crazy because he didn't except it

step-by-step explanation:

123123 step byt step

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.

the solution, from the graphing of the two lines, is (3,2), i.e., x = 3, y = 2.