What is −2 1/4 ⋅ (−2 13) ? A −5 1/4 B −4 1/12 C 4 1/12 or D 5 1/4

1 answer:

8 0

Your question is not clear. I’m not sure if it’s -213 or -2 1/3...

But if you question was -2 1/4 x (-2 1/3),

then your answer would be
D= 5 1/4

Hope this helped! Let me know if you have any questions.

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Plz help!!

inysia [295]

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91 rounds to 9
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A.7 B.17 C.70 D.700

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8 0

3 years ago

2. Describe how to use the conjugate to divide 2 − i by 3 + 2i, and then find the quotient.

DaniilM [7]

Answer:

$\frac{4}{13}-\frac{7}{13}i$

Step-by-step explanation:

$\frac{2-i}{3+2i}$

Multiply and divide by the conjugate.

The conjugate is the denominator with the sign of the complex number the opposite of the denominator.

$\frac{2-i}{3+2i}\frac{3-2i}{3-2i}\\ =\frac{2\times (3-2i)-i\times (3-2i)}{3^2-(2i)^2}\\ =\frac{6-4i-3i+2i^2}{9+4}\\ =\frac{4-7i}{13}\\ =\frac{4}{13}-\frac{7}{13}i$