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Citrus2011 [14]
2 years ago
13

What is the equation in point-slope form of a line that passes through the points(-2,4) and has a slope if 5

Mathematics
1 answer:
Lelechka [254]2 years ago
5 0

Answer:

Step-by-step explanation:it’s up two and left 4 and do that equation 5 times

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Step-by-step explanation:

I assume that "ground" is at 0 ft height. which is in an actual scenario not airways the case.

y = -16x² + 64x + 89

shows us that the tower is 89 ft tall (the result for x = 0, at the start).

anyway, if the original assumption is correct, then we need to solve

0 = -16x² + 64x + 89

the general solution for such a quadratic equation is

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in our case

a = -16

b = 64

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x = (-64 ± sqrt(64² - 4×-16×89))/(2×-16) =

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x1 = (-64 + 98.95453501...)/-32 = -1.092329219... s

x2 = (-64 - 98.95453501...)/-32 = 5.092329219... s

the negative solution for time is but useful here (it would be the time calculated back to ground at the start).

so, x2 is our solution.

the rocket hits the ground after about 5.09 seconds.

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