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11Alexandr11 [23.1K]
2 years ago
8

Express the following expression in the form of a + bi: (-41 + 3i) - (-11 + 15i) (-6 + 5i)

Mathematics
1 answer:
Bad White [126]2 years ago
6 0

The simplified expression of the complex number expression is -32 + 148i

<h3>How to rewrite the complex number expression?</h3>

The expression is given as:

(-41 + 3i) - (-11 + 15i) (-6 + 5i)

Evaluate the product

(-41 + 3i) - (-11 + 15i) (-6 + 5i) =  (-41 + 3i) - (66 - 55i -90i - 75)

Open the brackets

(-41 + 3i) - (-11 + 15i) (-6 + 5i) =  -41 + 3i - 66 + 55i +90i + 75

Evaluate the like terms

(-41 + 3i) - (-11 + 15i) (-6 + 5i) =  -32 + 148i

Hence, the simplified expression of the complex number expression is -32 + 148i

Read more about complex number at

brainly.com/question/10662770

#SPJ1

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A system for tracking ships indicated that a ship lies on a hyperbolic path described by 5x2 - y2 = 20. the process is repeated
zysi [14]
Answer:
The ship is located at (3,5)

Explanation:
In the first test, the equation of the position was:
5x² - y² = 20 ...........> equation I
In the second test, the equation of the position was:
y² - 2x² = 7 ..............> equation II
This equation can be rewritten as:
y² = 2x² + 7 ............> equation III

Since the ship did not move in the duration between the two tests, therefore, the position of the ship is the same in the two tests which means that:
equation I = equation II

To get the position of the ship, we will simply need to solve equation I and equation II simultaneously and get their solution.

Substitute with equation III in equation I to solve for x as follows:
5x²-y² = 20
5x² - (2x²+7) = 20
5x² - 2y² - 7 = 20
3x² = 27
x² = 9
x = <span>± </span>√9

We are given that the ship lies in the first quadrant. This means that both its x and y coordinates are positive. This means that:
x = √9 = 3

Substitute with x in equation III to get y as follows:
y² = 2x² + 7
y² = 2(3)² + 7
y = 18 + 7
y = 25
y = +√25
y = 5

Based on the above, the position of the ship is (3,5).

Hope this helps :)
8 0
3 years ago
Jim's Camera shop sells two high-end cameras, the Sky Eagle and Horizon. The demands for these two cameras are as follows: DS =
BartSMP [9]

The revenue is given by the product of the price and the demand function

  • The revenue function for Sky Eagle is <u>RS = 229·PS - 0.60·PS² + 0.35·PS·PH</u>.
  • The revenue function for Horizon is <u>RH = 269·PH + 0.10·PS·PH - 0.64·PH²</u>.

Reasons:

The given parameters are;

The demand function for the Sky Eagle, DS = 229 - 0.60·PS + 0.35·PH

The demand function for the Horizon, DH = 269 + 0.10·PS - 0.64·PH

The above demand functions gives the quantity demanded

Therefore, the revenue function is given by the product of the price and the demand function as follows;

RS = PS × DS = PS × (229 - 0.60·PS + 0.35·PH) = 229·PS - 0.60·PS² + 0.35·PS·PH

The revenue for Sky Eagle <u>RS = 229·PS - 0.60·PS² + 0.35·PS·PH</u>

<u />

Revenue for Horizon is found as follows;

RH = PH ×(269 + 0.10·PS - 0.64·PH) = 269·PH + 0.10·PS·PH - 0.64·PH²

The revenue for Horizon, <u>RH =  269·PH + 0.10·PS·PH - 0.64·PH²</u>

Learn more demand function here:

brainly.com/question/16888880

5 0
3 years ago
Solve this linear equation by graphing <br> 1/2x-y=4<br> 2y=x+6
Oliga [24]

Answer:

see attachment for answer.

Step-by-step explanation:

1/2x-y=4 and 2y=x+6 plot

5 0
3 years ago
What's Pi to 12 decimal places
Margarita [4]
3.14159265358979

That's more than 12 decimal places but it's all I remember off-by-heart.
8 0
3 years ago
Is 64 a rational number or irrational?
Nikitich [7]

Answer:

Step-by-step explanation:

the answer is irrational hope this helps

7 0
3 years ago
Read 2 more answers
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