Question

The equation - 5x² + 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. In which year were 598 students enrolled?

Answer 1

-5x^2+72x+378=598

Answer 2

5x² + 72x + 378 = 598
-5x² + 72x = 220
5x² - 72x + 220 = 0

Solving by quadratic formula,
x = 4.4 years or 10 years

Answer 3

The available answers are 1992, 1998, 2000, 2010

Answer 4

1990+10=2000

Answer 5

Thanks!!

Answer 6

My Pleasure.