Given that x2 – 8x + 9 = (x – a)2 – b for all values of x, (i) Find the value of a and the value of b. а = I b = (ii) Hence write down the coordinates of the turning point on the graph of y = x2 - 8x + 9 (,)

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20

How can you check that you have correctly converted frequencies to relative frequencies?