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ivanzaharov [21]
3 years ago
6

Two sides of a parallelogram are 28 feet and 27 feet. The measure of the angle

Mathematics
1 answer:
Firlakuza [10]3 years ago
7 0

Answer:7

Step-by-step explanation:

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Are the associative properties true for all integers?
Thepotemich [5.8K]

Its true for integers if you are using the associative property in addition or multiplication ONLY.

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Plz answer im desperate thank you!
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If a = √3-√11 and b = 1 /a, then find a² - b²​
Serga [27]

If b=\frac1a, then by rationalizing the denominator we can rewrite

b = \dfrac1{\sqrt3-\sqrt{11}} \times \dfrac{\sqrt3+\sqrt{11}}{\sqrt3+\sqrt{11}} = \dfrac{\sqrt3+\sqrt{11}}{\left(\sqrt3\right)^2-\left(\sqrt{11}\right)^2} = -\dfrac{\sqrt3+\sqrt{11}}8

Now,

a^2 - b^2 = (a-b) (a+b)

and

a - b = \sqrt3 - \sqrt{11} + \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{9\sqrt3 - 7\sqrt{11}}8

a + b = \sqrt3 - \sqrt{11} - \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{7\sqrt3 - 9\sqrt{11}}8

\implies a^2 - b^2 = \dfrac{\left(9\sqrt3 - 7\sqrt{11}\right) \left(7\sqrt3 - 9\sqrt{11}\right)}{64} = \boxed{\dfrac{441 - 65\sqrt{33}}{32}}

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1 year ago
I need some help with my math question
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Answer:

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There are same number on -2, -1 1 ,2

and it also means that 0,0 is the minime

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This is the correct answer: 3x^3 - x^2 + 6x - 9
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