Mathematics: Jan thinks of a positive number. She doubles it, then adds 3. Then she squares the result. She tells the answer to Sadiq. a) Let x stand for the number Jan thinks of. Write down an expression for the answer she tells Sadiq.

Jan thinks of a positive number. She doubles it,

Ответ:

unruhlsY25

08.01.2021

Mathematics

The answer is what you said to you about you like you do you kenkwne d f bun besen r this bye bye

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Ответ:

arletsolis23p2cjls

18.11.2020

Mathematics

$\large\boxed{1.\overline{21}=\dfrac{40}{33}}$

Step-by-step explanation:

$x=1.\overline{21}\\\\x=1.212121...\qquad\text{multiply both sides by 100}\\\\100x=121.212121...\\\\\text{subtract x from 100x}\\\\100x-x=121.212121...-1.212121...\\\\99x=120\qquad\text{divide both sides by 99}\\\\x=\dfrac{120}{99}\\\\x=\dfrac{120:3}{99:3}\\\\x=\dfrac{40}{33}$

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Jan thinks of a positive number. She doubles it, then adds 3. Then she squares the result. She tells the answer to Sadiq.

a) Let x stand for the number Jan thinks of.
Write down an expression for the answer she tells Sadiq.

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