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26 June, 04:10

3. A ball bounces and you are launching a rock to hit it. The equation of the ball bouncing is

y = - x2 + 4x + 4, and the launching of the rock equations was y=-2x+4. When would the rock hit the

ball?

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Answers (1)
  1. 26 June, 04:22
    0
    When x = 6.

    Step-by-step explanation:

    WE need to solve the system:

    y = - x^2 + 4x + 4

    y = - 2x + 4

    Equating:

    - x^2 + 4x + 4 = - 2x + 4

    0 = x^2 - 4x - 4 - 2x + 4

    x^2 - 6x = 0

    x (x - 6) = 0

    x = 0, 6.
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Home » Mathematics » 3. A ball bounces and you are launching a rock to hit it. The equation of the ball bouncing is y = - x2 + 4x + 4, and the launching of the rock equations was y=-2x+4. When would the rock hit the ball?
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