3² = -1*3² = -1 * 9 = -9 (order of operations) while (-3)² = (-) = +9 or 9

evaluate: z2 – x2 -xy if x = -2, y = 3, and z = -4 ( see section 1.8 for further review)

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Answer for 10 points show work you guys in advanced < 3

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?