Question

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?

Answer 1

Answer:

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.