okay so I don't really understand how to change a decimal to a fraction and the teacher never really explained it to us and she

went really fast and like I hate showing my work because I'll always mess up

Mathematics

1 answer:

Fofino [41]2 years ago

5 0

$\bf 0.2121\overline{21}\qquad \qquad \qquad x=0.2121\overline{21}\\\\ -------------------------------\\\\ \stackrel{\textit{moving the 21 to the left}}{\stackrel{100\cdot x}{100\cdot 0.2121\overline{21}}}\implies 21.2121\overline{21}\implies \begin{array}{llll} 21&+&0.2121\overline{21}\\ 21&+&x \end{array} \\\\\\ therefore\qquad \qquad 100x = 21+x\implies 99x=21 \\\\\\ x=\cfrac{21}{99}\implies x=\stackrel{simplified}{\cfrac{7}{33}}$

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Read 2 more answers

What is (5/9×(°F-32))

djyliett [7]

Answer:

32º

Step-by-step explanation:

Fº-32 ×5/9

5/9Fº-160/9

5/9Fº =160/9

(5Fº)9=9(160)