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?

Question

Mathematics

English

23 February, 07:49

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?

+1

Answers (1)

Know the Answer?

Ada Rowland · Answer 1

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.

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

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?