1.) what number should be added to the expression x2+2x to change it into a perfect square trinomial? a.) 1 b.) 2 c.) 4 d.) 9 2.) what number should be added to the expression x2+10x to change it into a perfect square trinomial? a.) 5 b.) 10 c.) 25 d.) 100 3.) what are the solutions to the equation? b2−10b=39 enter your answers in the boxes. b = and 4.) which statement describes the first step to solve the equation by completing the square? 2x2+12x=32 a.) multiply both sides of the equation by 16 . b.) add 6 to each side of the equation. c.) multiply both sides of the equation by 12 . d.) add 36 to each side of the equation. 5.) what are the solutions to the equation? 3x2+6x=45 enter your answers in the boxes. x = and

The table shows population statistics for the ages of best actor and best supporting actor winners at an awards ceremony. the distributions of the ages are approximately bell-shaped. compare the z-scores for the actors in the following situation. best actor best supporting actor muequals42.0 muequals49.0 sigmaequals7.3 sigmaequals15 in a particular year, the best actor was 59 years old and the best supporting actor was 45 years old. determine the z-scores for each. best actor: z equals best supporting actor: z equals (round to two decimal places as needed.) interpret the z-scores. the best actor was (more than 2 standard deviations above more than 1 standard deviation above less than 1 standard deviation above less than 2 standard deviations below) the mean, which (is not, is) unusual. the best supporting actor was (less than 1 standard deviation below more than 1 standard deviation above more than 2 standard deviations below more than 1 standard deviation below) the mean, which (is is not) unusual.