"apply quickselect to find the median of the list of numbers 9, 12, 5, 17, 20, 30, 8."

12

Step-by-step explanation:

In statistics, the median is the value that separates the higher half from the lower half of a data sample. This means that it is the "middle" value of a data sample. In order to find the median, you need to place the numbers of your data sample in order of value, and identify the middle point. If two sets of numbers are in the middle, then you need to find the middle point between the two (by adding them and then dividing them by two).

Therefore:

5, 8, 9, 12, 17, 20, 30

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:

$35.59 in pounds

step-by-step explanation: