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2 years ago

20 pesos de 20 es: 20%

Mathematics

1 answer:

pashok25 [27]2 years ago

8 0

Answer:

hsindvjkdod idbdiid didgejdid idbdusie

Step-by-step explanation:

0gsss hsis % hesjdjzz ud

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(2×10^6 )×(0.00009)<br><br> IN SCIENTIFIC NOTATION

pshichka [43]

In scientific notation the answer is: 0.00018 x 10^6

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2 years ago

Express 59.2475 in words and expanded notation

enyata [817]

Hey, expressing 59.2475 would look like:

Word form: Fifty-nine and two thousand, four hundred seventy-five ten-thousandths.

Expanded Notation Form:

50 + 9 + 0.2 + 0.04 + 0.007 + 0.0005.

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3 years ago

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

Find k, the constant of proportionality, for the data in this table. Then write an equation for the relationship.

VashaNatasha [74]

Answer:

$k=\frac{32}{5}$ , $y=\frac{32}{5}x$

$k=6.4$ , $y=6.4x$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

Find the value of the constant of proportionality k

take any ordered pair from the data

For x=25, y=160

$k=\frac{y}{x}$

substitute the values of x and y

$k=\frac{160}{25}$

simplify

$k=\frac{32}{5}$

The linear equation is equal to

$y=\frac{32}{5}x$

$y=6.4x$

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2 years ago

Some middle school students are asked if they play checkers and chess. The results of the survey are shown in the table.

BaLLatris [955]

How’s everybody’s day :)

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2 years ago

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