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3 years ago

Solve this using square roots and show your work please 4x^2-256=0

Mathematics

1 answer:

mamaluj [8]3 years ago

5 0

Answer:

x = ± 8

Step-by-step explanation:

Given

4x² - 256 = 0 ( add 256 to both sides )

4x² = 256 ( divide both sides by 4 )

x² = 64 ( take the square root of both sides )

x = ± $\sqrt{64}$ = ± 8

Solutions are x = - 8, x = 8

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frozen [14]

Answer:

The length of the third side of given triangle lies between 6.5 and 19.9.

Step-by-step explanation:

The law of cosine is as follows

$c^{2} =a^{2}+b^{2}+2abcos\alpha$ ---------------1

⇒ a and b are the given sides of the triangle and c is the third side, and $\alpha$ is the angle between a and b .

In equation 1 , the maximum and minimum values of $cos\alpha$ are 1 and -1.

so the value of c lies in between

⇒ $\sqrt{a^{2}+b^{2}-2ab }$ and $\sqrt{a^{2}+b^{2}+2ab }$ = $|a-b| and |a+b|$

Given a=13.2 and b=6.7 so the the side lies in between |13.2-6.7| and |13.2+6.7|

so the third side lies between 6.5 and 19.9

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2 years ago

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lakkis [162]

Answer:

Step-by-step explanation:

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2 years ago

How to I write 1 2/3 as an improper fraction help ASAP

vagabundo [1.1K]

You would write 5/3 for it to be an improper fraction

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2 years ago

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Inga [223]

Answer:

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Step-by-step explanation:

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2 years ago

6.{6.G.A.4} Find the surface area. Answer without units. *

Agata [3.3K]

Answer:

392

Step-by-step explanation:

3 rectangular faces

7 x 16 = 112

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Total surface area:

112 + 112 + 112 + 28 + 28 = 392

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2 years ago