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igor_vitrenko [27]
3 years ago
5

Sandra buys 70 pencils with fuzzy tops. she gives 4 to each of her 15 classmates. The expression for the number of pencils she h

as left is 70 - (4x15)
In this expression, what does 70 represent?
Mathematics
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

70 pencils

Step-by-step explanation:

it says 70 pencils so 70 represents pencils

Hope this helps plz hit the crown :D

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Use DeMoivre's Theorem to find (3cis*pi/6)^3
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The correct value of (3cis(pi/6))³ is 27i.

<h3>What is Complex Number?</h3>

Complex numbers are numbers that consist of two parts — a real number and an imaginary number. Complex numbers are the building blocks of more intricate math, such as algebra.

Given the complex number in polar coordinate expressed as

z = r(cos∅+isin∅)

zⁿ =  {r(cos∅+isin∅)}ⁿ

According to DeMoivre’s Theorem;

zⁿ =  rⁿ(cosn∅+isinn∅)

Given the complex number;

(3cis(pi/6))³

= {3(cosπ/6 + isinπ/6)}³

Using  DeMoivre’s Theorem;

= 3³(cos3π/6 + isin3π/6)

=  3³(cosπ/2 + isinπ/2)

= 3³(0 + i(1))

= 27i

Thus, the correct value of (3cis(pi/6))³ is 27i.

Learn more about Complex number from:

brainly.com/question/10251853

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2 years ago
There were 567 children eating lunch there was 323 children drinking milk and 136 children drinking orange juice the rest of the
ahrayia [7]

Answer:

108 children were drinking apple juice. $432 were spent on pizza.

Step-by-step explanation:

How many children were drinking apple juice:

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How many children were eating pizza:

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How much was spent on pizza:

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Step-by-step explanation:

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