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jasenka [17]
3 years ago
9

What are the domain and range of the function {(3, 1), (5, –1), (9, –1), (2, 7), (–4, 1)}?

Mathematics
1 answer:
alisha [4.7K]3 years ago
8 0
The domain are x's and the range are y's.

x's are 3,5,9,2,-4
y's are 1,-1,7

So it's D.
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14.52 seconds.

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We have been given that the height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation y=-16x^2+224x+121. We are asked to find the time, when the rocket will hit the ground.

We know that the rocket will hit the ground, when height will be 0. So to find the time when rocket will hit the ground, we will substitute y=0 in our given equation as:

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Let us solve for x using quadratic formula.

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

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