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3 years ago

THIS IS THE FOURTH TIME I'VE ASKED PLEASE ANSWER √(10 + 4 √(6)) not decimal form

Mathematics

1 answer:

nalin [4]3 years ago

5 0

Answer:

$\huge\boxed{\sqrt{10+4\sqrt6}=\sqrt6+2}$

Step-by-step explanation:

$\sqrt{10+4\sqrt6}=\sqrt{6+4+(2)(2)(\sqrt6)}=\sqrt{\underbrace{(\sqrt6)^2}_{=6}+(2)(2)(\sqrt6)+\underbrace{2^2}_{=4}}\\\\\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\=\sqrt{(\sqrt6+2)^2}\\\\\text{use}\ \sqrt{a^2}=|a|\\\\=|\sqrt6+2|=\sqrt6+2$

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3 years ago

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3 years ago

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Mashcka [7]

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If we spent greater amount of money on advertisement, thus, we create more awareness and thus, the number of item sold increases.

Similarly, if less money is spent on advertisement, the number of items sold will be less.

Thus, the money spent on advertisement varies directly with the number of items sold.

Thus, they have a positive relationship or a positive correlation.

b) Money spent in advertising to sell 30 items

We are given the function:

$y= 1.6x+ 21.5$

We put x = 30

$y(30)= 1.6(30)+ 21.5\\y(30) = 69.5$

Thus, the score predicted by model is 69.5 units.

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Comparing the equation to a general linear equation, we get

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Comparing we get,

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3 years ago

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Answer:

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