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. How many students did the school have when it opened?

Answer 1

\[x= {-b \pm \sqrt{b^2-4ac} \over 2a}\]

Answer 2

a=-5 b=72 c=378

Answer 3

can you solve this?

Answer 4

sec

Answer 5

one sec let me see

Answer 6

let x = 0

then the number of students at the start was 378

Answer 7

nope

Answer 8

so 378?

Answer 9

Students

Answer 10

yup.

Answer 11

ok cool thanks!