Emilio throws a marshmallow into the air from his balcony. The height of the marshmallow (in feet) is represented by the equation h=−16(t−14

Question

Emilio throws a marshmallow into the air from his balcony. The height of the marshmallow (in feet) is represented by the equation h=−16(t−14)2+49, where t is the time (in seconds) after he throws the marshmallow. How long after Emilio throws the marshmallow does it reach its maximum height?

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Thanh Thu 2 months 2021-07-30T18:13:10+00:00 1 Answers 1 views 0

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    2021-07-30T18:14:52+00:00

    Answer:

    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

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )