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zalisa [80]
3 years ago
9

Confused, and there's a test tomorrow.

Mathematics
1 answer:
-BARSIC- [3]3 years ago
5 0

Answer:

  12y +16yi

Step-by-step explanation:

The thing about complex numbers is that you can treat them as binomials and use all of the things you know about multiplying and factoring polynomials.

Here, we assume you have ...

  (5 +2yi)(4 -3i) -(5 -2yi)(4 -3i)

The factor (4 -3i) can be factored out, so you have ...

  = ((5 +2yi) -(5 -2yi))(4 -3i)

  = (4yi)(4 -3i)

  = 16yi -12yi²

At this point, the definition of i comes into play, and you replace i² with -1.

  = 12y +16yi

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Step-by-step explanation:

also thats just science

5 0
4 years ago
If $6,000 is invested for six years and seven months at 6% compounded semi-annually, what is the interest that the investment ea
Vera_Pavlovna [14]

Answer: Option (B) is correct.

<em>Given:</em>

<em>P = $6000</em>

<em>r = 6%</em>

<em>t = 6 years and 7 months = 79 months</em>

∵ It is compounded semi-annually

∴ I = P\times(1+\frac{r/2}{100})^{\frac{t}{6} } - P

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4 0
4 years ago
2/3x - 1/2y = 3
Makovka662 [10]
The correct answer for this question would be the second option. <span>4x - 3y = 18 and x + 2y = 10. So in order to know why this is the answer, let us check it. Since the given numbers have fractions, let us eliminate the fractions.
2/3x - 1/2 y = 3 <<multiply both sides by 6
and we get 4x - 3y = 18 (So this one is correct)
Next,
1/2x + y = 5 << multiply both sides by 2 and we get
x + 2y = 10 (This one is correct too)
Hope this answer helps. </span>
3 0
3 years ago
Read 2 more answers
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7 0
3 years ago
Which verbal expression best describes the algebraic expression 2x ÷ 4?
lakkis [162]
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5 0
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