4, 4, 6, 7, 9, 9, 9, 10, 14, 17, 21
Mean:

Median:

Mode:

Range:

hmmm

Mean: 99

Median: 9

Mode: 9

Range: 17

Step-by-step explanation:

Mean is adding all the numbers together then subtracting by the number of numbers you added:

4 + 4 + 6 + 7 + 9 + 9 + 9 + 10 + 14 + 17 + 21 = 110

110 - 11 = 99

Median is the middle number: 9

The number that appears the most often is the mode: 9

The range is the difference between the lowest and highest number:

21 - 4 = 17

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source: