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NikAS [45]
3 years ago
15

Whats the answer to x 2x x -16

Mathematics
1 answer:
Pavel [41]3 years ago
4 0

Answer:

-32x

Step-by-step explanation:

2x16=32 add the negative sign because negative

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Sarah kicked a ball in the air. The function
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Answer: The ball hits the ground at 5 s

Step-by-step explanation:

The question seems incomplete and there is not enough data. However, we can work with the following function to understand this problem:

f=30 t- 6t^{2} (1)

Where f models the height of the ball in meters and t the time.

Now, let's find the time t when the ball Sara kicked hits the ground (this is when f=0 m):

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Dividing both sides of the equation by 6:

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This quadratic equation can be written in the form at^{2}+bt+c=0, and can be solved with the following formula:  

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a=1  

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c=0  

Substituting the known values:  

t=\frac{-(-5) \pm \sqrt{(-5)^{2}-4(1)(0)}}{2(1)} (6)  

Solving we have the following result:

t=5 s  This means the ball hit the ground 5 seconds after it was kicked by Sara.

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