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weqwewe [10]
1 year ago
10

Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $28 monthly fee

and charges an additional
$0.14 for each minute of calls. The second plan has a $19 monthly fee and charges an additional $0.19 for each minute of calls. For how many minutes of calls
will the costs of the two plans be equal?
Mathematics
1 answer:
aniked [119]1 year ago
7 0

Answer:

POINTS

Step-by-step explanation:

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Explain and demonstrate the multiplication of complex conjugates using 2+3i and its complex conjugate. Be sure to discuss all st
krok68 [10]

The product of a <em>complex</em> number and its conjugate is (a + i b) · (a - i b), where a and b are <em>real</em> numbers, and the result for the <em>complex</em> number 2 + i 3 is 13.

<h3>What is the multiplication of a complex number and its conjugate</h3>

Let be a <em>complex</em> number a + i b, whose conjugate is a - i b. Where a and b are <em>real</em> numbers. The product of these two numbers is:

(a + i b) · (a - i b)

Then, we proceed to obtain the result by some algebraic handling:

a · (a + i b) + (- i b) · (a + i b)

a² + i a · b - i a · b - i² b²

a² - i² b²

a² + b²

If we know that a = 2 and b = 3, then the product of the complex number and its conjugate is:

z\cdot \bar z = 2^{2} + 3^{2}

z\cdot \bar z = 13

To learn more on complex numbers: brainly.com/question/10251853

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2 years ago
Norah wants to download 2 different applications on her phone. 1 used 2.42 megabytes. The other 1 used 1.76. How many total mega
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Read 2 more answers
HELPPP FIND THE AREA !!
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Answer:

To find the area, you have to multiply its height by its width.

Step-by-step explanation:

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