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shutvik [7]
3 years ago
7

Weightbof 72 books is 9 kg. what is thebweight of 80 such books?How many such books would weigh 6 kg?

Mathematics
1 answer:
ASHA 777 [7]3 years ago
5 0
First, you would divide 9/72 by 72/72 and would get .125. So every book weighs .125 kg. 

Then, to find how much 80 book weigh, you multiply 80 times .125 and get 10. 

Lastly, to find how many books weigh 6 kg you, keep multiplying .125 by a number until you reach 6 kg. In this case the number is 48. So 48 books weigh 6 kg. 

Hope this helped! ;D
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sergij07 [2.7K]

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ANSWER

2 \sqrt{2} ( \cos( \frac{7\pi}{4}   + i  \sin(  \frac{7\pi}{4} ) )

EXPLANATION

The complex number shown has coordinates (2,-2)

or

z = 2 - 2i

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The argument is

\theta= \tan^{ - 1} ( \frac{ - 2}{2} )

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The polar form is

2 \sqrt{2} ( \cos( \frac{7\pi}{4}   + i  \sin(  \frac{7\pi}{4} ) )

The first option is correct.

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IRISSAK [1]

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Now find the x-intercepts:  Let y = 0 and solve the resulting equation for x:

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Arithmetic sequences are sequences containing these patterns. The distance between succeeding terms in an arithmetic series is always the same. The difference between consecutive words is always two, hence the sequence 3, 5, 7, 9... is arithmetic.

An explicit formula that states a = d (n - 1) + c, where d is the common difference between succeeding words, and c = a1, can be used to establish an arithmetic sequence.

To learn more about arithmetic sequence from the given link:

brainly.com/question/15412619

#SPJ4

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