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lesya692 [45]
3 years ago
11

John is buying food at the grocery store. He has made a list of 90 items that he needs to buy. He has bought 1/6 of the items. H

ow many items has he bought?
Mathematics
1 answer:
Lynna [10]3 years ago
6 0

Answer:

15 is the correct answer

Step-by-step explanation:

because if you divide 90 by 6 its 15

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81x⁴+64y⁴ factorize <br>​
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Step-by-step explanation:

81 {x}^{4}  + 64 {y}^{4}  \\( 9x ^{2} )^{2}  + (8y ^{2} ) ^{2}  \\

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insens350 [35]
The angles are 45° 60° and 75°

Elaboration:
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( since the sum of interior angles of triangle=180° )
3x+4x+5x= 180
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x = 15
3x= 45
4x= 60
5x= 75


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2 years ago
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AlekseyPX

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we'll move the repeating part to the left-side of the dot, by multiplying by "1" and as many zeros as needed, or 10 at some power pretty much.

on 0.13 we need 100 to get 13.13.... and on 0.1234, we need 10000 to get 1234.1234....


\bf 0.\overline{13}~\hspace{10em}x=0.\overline{13}&#10;\\\\[-0.35em]&#10;~\dotfill\\\\&#10;\begin{array}{|lll|ll}&#10;\cline{1-3}&#10;&&\\&#10;100\cdot 0.\overline{13}& = & 13.\overline{13}\\&#10;100\cdot x&& 13 + 0.\overline{13}\\&#10;100x&&13+x&#10;\\&&\\&#10;\cline{1-3}&#10;\end{array}\implies \begin{array}{llll}&#10;100x=13+x\implies 99x=13&#10;\\\\&#10;x=\cfrac{13}{99}&#10;\end{array}&#10;\\\\[-0.35em]&#10;\rule{34em}{0.25pt}\\\\&#10;0.\overline{1234}~\hspace{10em}x=0.\overline{1234}&#10;\\\\[-0.35em]&#10;~\dotfill


\bf \begin{array}{|ccc|ll}&#10;\cline{1-3}&#10;&&\\&#10;10000\cdot 0.\overline{1234}&=&1234.\overline{1234}\\&#10;10000\cdot x&=&1234+0.\overline{1234}\\&#10;10000x&=&1234+x&#10;\\&&\\&#10;\cline{1-3}&#10;\end{array}\implies \begin{array}{llll}&#10;10000x=1234+x&#10;\\\\&#10;9999x=1234\implies x=\cfrac{1234}{9999}&#10;\end{array}

7 0
3 years ago
Read 2 more answers
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Vlad1618 [11]

Answer:

Step-by-step explanation:

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