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3 years ago

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]3 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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Answer:

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Step-by-step explanation:

In the 4th quadrant, sin is negative;

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Adjacent = √3

Hypotenuse = 2

Get the opposite;

opp^2 = 2^2 -(√3)^2

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CostR = (√3/2)/(-1/2)

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4 years ago

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user100 [1]

Answer:

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Step-by-step explanation:

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Answer:

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