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spayn [35]
4 years ago
11

Please help me out and explain it to me​

Mathematics
1 answer:
a_sh-v [17]4 years ago
8 0

Answer: C

Step-by-step explanation:

You can solve this by first multiplying both sides of the fraction by the conjugate of the denominator.

In this case, the conjugate is (8 - 2i).

So:

\frac{3-5i}{8+2i} *\frac{8-2i}{8-2i}

Simplify:

\frac{24-46i+10i^2}{64 - 4i^2}

Simplify again, knowing that i^2 = -1

\frac{14 -46i}{68}

Then, divide both numbers in the numerator by 68 to get your answer.

\frac{7}{34} -\frac{23i}{34}

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That means that the ratio 7 / 28 is equal to the ratio 2 : 8. 

You can verify the equality by simplifying to the simplest form:

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     2 : 8 = 1 / 4 simplest form, then the proportion is right.

In words that is 7 is to 28 as 1 is to 4 ← answer


2) Proportion b.<span>. 3⁄1 = 18⁄6
</span><span>
</span><span>
</span><span>In words: 3 is to q as 18 is to 6 ← answer
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</span><span>You can verify the proportion by simplifiying the second fraction:
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</span><span>     18 / 6 = [18 / 6] / [ 6 / 6] = 3 / 1
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</span><span>3) Proportion c. 9 : 72 = 2 : 16
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</span><span>In words: 9 is to 72 as 2 is to 16 ← answer
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</span><span>Proove the proportion:
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</span><span>     9 / 72 = 1 / 8
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</span><span>     2 / 16 = 1 / 8
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</span><span>4) Proportion d. 81⁄9 = 45⁄5</span>

In words: 81 is to 9 as 45 is to 5 ← answer


Proove it: 
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The answer of this problem is the letter C. -3.3
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