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1 March, 12:33

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. Which equation can be used to find the year in which 502 students were enrolled?

A. - 5x² + 72x - 124 = 0

B. - 5x² + 72x + 502 = 0

C. - 5x² + 72x - 502 = 0

D. - 5x² + 72x + 124 = 0

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Answers (1)
  1. 1 March, 15:52
    0
    502 is how many students enrolled

    502=-5x^2+72x+378

    minus 502 from both sides since all are equal zero

    0=-5x^2+72x-124

    answer is A
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