uaine2002
20.02.2020 •
Mathematics
Which of the following points is a solution to y ≤ −2x + 3?
(0, 4)
(1, 0)
(3, −2)
(5, −2)
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Ответ:
Step-by-step explanation:
−16t^2+8t+48 = 0
- 2t^2 + t + 6 = 0
Multiplying through by the negative sign. It becomes
2t^2 - t - 6 = 0
2t^2 + 3t - 4t - 6 = 0
t(2t + 3) - 2(2t + 3) = 0
(t - 2)(2t + 3) = 0
t - 2 = 0 or 2t + 3 = 0
t = 2 or t = - 3/2
The time cannot be negative
So it will take 2 seconds to hit the ground