Simplify the expressions and find the value: a) x (x-3) + 2 for x = 2, -1
b)3y (2y - 7) - 3 (y-4) - 63 for y = 1, y = 0

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)