What number must be added to the expression below to complete the square x^2-x

+1/4

Step-by-step explanation:

We need a formula (a-b)^2=a^2-2ab+b^2

We have a=x and -2ab=x, so b=-1/2, then we add b^2 and it is 1/4.

(X^2-x+1/4)=(x-1/2)^2

c

step-by-step explanation:

it isn't d, because the interquartile range is from 27-57. and the interquartile range is basically half the data, it's pretty obvious.

it isn't b, because like i said earlier, the interquartile range is from 27-57. 57-27 is 30. the real range has to be longer

not a either. although it looks like it, 3/4 of the data is not greater than 27. but if c is wrong than this should be correct

the correct answer is c, because 13 is the point in which the plot starts