<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B21%7D%20" id="TexFormula1" title=" \sqrt{21} " alt=" \sqrt{21} " align="absmiddle

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iren [92.7K]

3 years ago

" class="latex-formula">

Mathematics

2 answers:

Kobotan [32]3 years ago

5 0

The Answer: √21 = 4.582576

GalinKa [24]3 years ago

3 0

Put it in the calculator and you should get the answer of 4.582575695

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9. Mariah has 28 centimeters of reed

il63 [147K]

10.28 , 28 cm in meters is 0.28. you have 10 meters therefore 10+.28= 10.28

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3 years ago

Simplify. 3725−−√−2825−−√+6325−−√ 457√ 7√ 257√ 857√

Andru [333]

Answer:

Option A.

Step-by-step explanation:

Consider the given problem is

$3\sqrt{\frac{7}{25}}-\sqrt{\frac{28}{25}}+\sqrt{\frac{63}{25}}$

Using the properties of radical expressions we get

$3\cdot \frac{\sqrt{7}}{\sqrt{25}}-\frac{\sqrt{28}}{\sqrt{25}}+\frac{\sqrt{63}}{\sqrt{25}}$ $[\because \sqrt{\frac{a}{b}}=\frac{\sqrt{a}}{\sqrt{b}}]$

$3\cdot \frac{\sqrt{7}}{\sqrt{25}}-\frac{\sqrt{4}\sqrt{7}}{\sqrt{25}}+\frac{\sqrt{9}\sqrt{7}}{\sqrt{25}}$ $[\because \sqrt{ab}=\sqrt{a}\sqrt{b}]$

$3\cdot \frac{\sqrt{7}}{5}-\frac{2\sqrt{7}}{5}+\frac{3\sqrt{7}}{5}$

Taking out common factors.

$\frac{\sqrt{7}}{5}(3-2+3)$

$\frac{\sqrt{7}}{5}(4)$

$\frac{4\sqrt{7}}{5}$

The simplified form of given expression is $\frac{4}{5}\sqrt{7}$

Therefore, the correct option is A.

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3 years ago

Which transformation can NOT be used to prove that ABC is congruent to DEF

jarptica [38.1K]

The transformation you'd need to use would be a dilation.

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3 years ago

What value represents the vertical translation from the graph of the<br> (x+5)2+3?<br> 0 -5<br> O-3

neonofarm [45]

Answer:

The value 3 represents the vertical translation upwards of $f(x)$ to $g(x)$

Step-by-step explanation:

The question is incomplete or missing data.

The correct question

What value represents the vertical translation from the graph of the parent function $f(x) = x^2$ to the graph of the function

$g(x) = (x + 5)^2 + 3$ ?

Given functions:

Parent function

$f(x) = x^2$

Translated function

$g(x) = (x + 5)^2 + 3$

Translation rules

For horizontal shift

$f(x)\rightarrow f(x+c)$

If $c>0$ the function shifts $c$ units to the left.

If $c$ the function shifts $c$ units to the right.

For vertical shift

$f(x)\rightarrow f(x)+c$

If $c>0$ the function shifts $c$ units to the up.

If $c$ the function shifts $c$ units to the down.

From the functions given the translation rule can be given as:

$f(x)\rightarrow f(x+5)+3$

$g(x)=f(x+5)+3$

This shows the graph is shifted left by 5 units and upwards by 3 units.

Thus the value 3 represents the vertical translation of $f(x)$ to $g(x)$

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4 years ago

In a group of 84 kids, three-sevenths bought their lunches. Of those who bought their lunches, 9 got a slice of pizza. What is t

Alisiya [41]

3/7x84=36

Ans: 9/36=1/4

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3 years ago