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stiv31 [10]
2 years ago
13

Which expression is equivalent to 1/4 Y - 1/2? PLEASE HELP!!!

Mathematics
2 answers:
N76 [4]2 years ago
8 0

Answer:

= -1 ÷ 4 ( y - 1 ÷ 2 )

......................................

algol132 years ago
4 0

Answer:

Option 2

Step-by-step explanation:

¼Y - ½

= ¼Y - 2/4

= ¼(Y - 2)

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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):

0=30 t- 6t^{2} (2)

Rearranging the equation:

6t^{2}-30 t=0 (3)

Dividing both sides of the equation by 6:

t^{2}-5 t=0 (4)

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

t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a} (5)  

Where:  

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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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3 years ago
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