http://www.zonefootball.net/nfl-average-salary-2000/
algebra word problem?
Can you show me how figgure this? The mean and annual salary (in dollars) for NFL players for the years 1998 to 2000 is given by the equation y = 57,000 x ^ 2 – 14000x + 1,000,000, where x = 0 represents 1998. Suppose that this trend continues and predict the year when the average NFL salary will be $ 3,695,000. (Source: Based on data from the Players Association NFL)
y = 57000x ² – 14000x + 3695 = 1000000 57x ² – 14x + 1000 57x ² – 14x + 1.000-3.695 = 0 57x ² – 14x – 2695 = 0 x = [-b ± √ (b ²-4ac)] / 2a x = [14 ± √ (14 ² 4 * 57 * 2695)] / 2 * 57 x = [14 ± √ (196 614460)] / 114 x = [14 ± 784] / 114 x = 7, neglecting the neg. answer 1998 +7 = 2005
