A) the quadratic x^2-4x-21 can be written in the form (x+a)^2+b find the values of and and b b) hence, or otherwise, solve the equation x^2-4x-21=0

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is