Respuesta :
Answer:
252.5
Step-by-step explanation:
y = -0.004x^2 + x + 2.5
-0.004x^2 + x + 2.5 = 0
x = 25(5+√26) = 252.5
Let me know fi you need any other help:)
I had this problem on my quiz, I dont know what you mean by + -25 but hope this will help