SOLUTION: A census study shows that the population from 1990 to 1998 of the only large town in a certain county can be modeled by the formula 102t2 - 225t + 3090 where t = 0 represents the y

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Question 1014037: A census study shows that the population from 1990 to 1998 of the only large town in a certain county can be modeled by the formula 102t2 - 225t + 3090 where t = 0 represents the year 1990 and that over the same years, the population of the surrounding county (not including the town) can be modeled by the formula 125t2 + 72t + 4978 where t = 0 represents the year 1990. Find a model for the total population of the county during the years 1990 to 1997.
Thank you in advance for any help!
Daniel H. Jack

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
I think you just add the equations and
set +t+=+7+
+102t%5E2+%2B+125t%5E2+-+225t+%2B+72t+%2B+3090+%2B+4978+
+227t%5E2+-+153t+%2B+8068+
Use the quadratic formula to solve for +t+
Hope I got it