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3 years ago

Si a = 7; b = – 2 , entonces 6ab es:

Mathematics

1 answer:

aleksklad [387]3 years ago

3 0

$\implies {\blue {\boxed {\boxed {\purple {\sf {d. \: - 84}}}}}}$

$\sf \bf {\boxed {\mathbb {Step-by-step\:explanation:}}}$

✒ $\: 6\:a\:b$

Plugging in the value "a = 7" and "b = -2" in the above expression, we have

✒ $\: 6 \times 7 \times ( - 2)$

✒ $\: - 84$

$\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}$

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Answer:

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Step-by-step explanation:

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The length of a rectangle measures 2x, and the width measures x + 2.

This means that the perimeter of the rectangle is:

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$8x - 6x = 20 + 4$

$2x = 24$

$x = \frac{24}{2}$

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Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

$z1=\frac{2}{5} (cos63 + isin63)\\z2=\frac{10}{3} (cos 117 + isin117})$

Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

A+B = 63+117 =180

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