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Olenka [21]
3 years ago
7

Find the product of each pair of complex conjugates.(3+8i)(3-8i)=

Mathematics
2 answers:
sdas [7]3 years ago
4 0
3*3=9

3 *-8i = -24i

8i *3 =24i

8i*-8i = -64i^2 or i^2 =-1. -64*-1=64

-24i + 24i =0

9+64= 73

Answer 73
kogti [31]3 years ago
4 0

Answer:

73

Step-by-step explanation:

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Help me with this problem!
kipiarov [429]

Answer:

y = -(2/3)x + 3  

C

Step-by-step explanation:

The slope of the equation that was given is - 2/3

The slope in a slope intercept equation is the number in front of the x when the value of the number in front of the y = 1 and x and y are on opposite sides of the equal sign. Let's translate that.

The original equation is y = -(2/3)x + 5/3

  • y and x have to be on opposite sides of the equal sign [They are]
  • The slope is the number in front of the x. That's (-2/3).  That makes A incorrect.

Now you need to use the given point

The point is (-3 , 5) Put this into the equation that you have so far

y = (-2/3)x + b

y = 5

x = -3

5 = (-2/3)(-3/1) + b Substitute in the givens

5 = (-2 * -3)/3 + b Multiply -2 * - 3 = 6

5 = 6/3  + b          Divide the 6 by 3

5 = 2 + b               Divide

5 - 2 = b                Subtract 2 from both sides

3 = b                      Switch sides

b = 3

Answer y = (-2/3)x + 3 or C


8 0
2 years ago
Three DVDs and four CDs cost $92. Two DVDs and three CDs cost
Vedmedyk [2.9K]

Answer:

DVD: $16

CD: $11

Step-by-step explanation:

These two linear equations can represent the system of equations where x equals the cost of a DVD and y equals the cost of a CD:

3x+4y=92

2x+3y=65

When graphed, the solution is at (16,11).

Therefore, one DVD costs $16 and one CD costs $11.

8 0
2 years ago
20<br> X<br> 40°<br> solve for x
kirza4 [7]
Could you please formulate you answer better? So we can get a bette understanding
8 0
3 years ago
The temperature is -3°F at 7:00 A.M. During the next 4 hours, the temperature increases 21°F. What is the temperature at 11:00 A
3241004551 [841]

Answer: 18°F

Step-by-step explanation: if you add 21 and -3 you get 18

4 0
3 years ago
5.524(2 significant figures)​
polet [3.4K]

Answer:

5.524 in 2 significant figures rounding the value to 2 non zero numbers.

<em>5</em><em>.</em><em>5</em><em>2</em><em>4</em><em> </em><em>=</em><em> </em><em>5</em><em>.</em><em>5</em><em> </em><em>(</em><em>2</em><em> </em><em>significant</em><em> figures</em><em>)</em>

7 0
2 years ago
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