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The equation -5x^2+72x+378 models the number of students enrolled in a school where x is the number of years since the school first opened in 1990. How many students did the school have when it opened?
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The equation -5x^2+72x+378 models the number of students enrolled in a school where x is the number of years since the school first opened in 1990. How many students did the school have when it opened?

User PavKR
by
7.8k points

1 Answer

4 votes
-5x+72x=67x
2+378=380
67x=380
380/67=6
x=6
User Andrei Drynov
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9.0k points
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