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Debora [2.8K]
3 years ago
14

Translate the statement below into a mathematical expression:

Mathematics
1 answer:
slega [8]3 years ago
5 0

Answer:

18-6=2+y

Step-by-step explanation:

18-6=2+y

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Rationalize the denominator of square root of negative 9 over open parentheses 4 minus 7 i close parentheses minus open parenthe
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The answer is
\frac{-6i-3}{5}.

Before we rationalize the denominator, we must simplify the numerator and denominator.  We evaluate the square root on the top, and combine like terms on the bottom:
\frac{\sqrt{-9}}{(4-7i)-(6-6i)}
\\
\\=\frac{\sqrt{9i^2}}{4-6-7i--6i}
\\
\\=\frac{3i}{-2-i}

To rationalize the denominator, we multiply by the conjugate.  The conjugate is found by making the imaginary term of the complex number, the i part, the opposite sign.  The conjugate of -2-i is -2+i:

\frac{3i}{-2-i}\times \frac{-2+i}{-2+i}
\\
\\=\frac{3i(-2+i)}{(-2-i)(-2+i)}
\\
\\=\frac{3i\times -2 + 3i\times i}{-2\times -2 + -2\times i + -2\times -i + -i\times i}
\\
\\=\frac{-6i+3i^2}{4-2i+2i-i^2}
\\
\\=\frac{-6i+3(-1)}{4-i^2}=\frac{-6i-3}{4-(-1)}=\frac{-6i-3}{5}
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3 years ago
The screen on Lin's cell phone allows for 8 lins of text per message. The maximum number of characters for each message is 10. H
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There will 80 characters per each line hold. Hope it help!
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The number 47 is decreased to 44. What is the percentage by which the number was decreased, to the nearest tenth of a percent?
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Mr. Hauseman has 17 students in his class, three of which are freshman and the others are sophomores and juniors. He is going to
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Answer:

17 I think because as know that 34-17 is 17.

Step-by-step explanation:

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