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Gelneren [198K]
3 years ago
14

Operations with complex numbers pls helppp

Mathematics
1 answer:
k0ka [10]3 years ago
7 0
Answers:
L = 4
M = -3

--------------------------------------

Explanation:

On the left side, the number 20-12i is in the form a+bi where a = 20 and b = -12

On the right side, 5L+(4M)i is in the form a+bi where a = 5L and b = 4M

Equating the real parts a = 20 and a = 5L has us get
5L = 20
5L/5 = 20/5
L = 4

Do the same with the imaginary parts as well
b = -12
b = 4M
4M = -12
4M/4 = -12/4
M = -3

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The sum of three consecutive numbers is 12 find the numbers
snow_tiger [21]
Let x,y,z be those numbers.
x+y+z = 12
Since x,y,z are consecutive: y=x+1, and z = x+2
Let's replace y and z by their new values:
x+x+1+x+2=12
3x+3=12
You subtract 3 from each side to get variables on a side, and numbers on the other:
3x=9
You divide both sides by 3:
x=3

y=x+1 = 3+1 = 4
z=x+2 = 3+2 = 5

So the numbers are 3; 4 and 5.

You can re-check your answers (very important):
3+4+5 = 12
3;4;5 are consecutive numbers.
The answer has been approved.

Hope this Helps! :)
7 0
3 years ago
Measure the screwdriver's length to the nearest tenth of a centimeter. Express the answer as a decimal.
Alja [10]

Answer:

17.1 cm

Step-by-step explanation:

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It is typically made of steel and has a handle and a shaft which ends as a tip.

In the context, the length of the screw driver from the given figure expressed to the nearest tenth of a centimeter is 17.1 cm.

It is also equivalent to $6\frac{3}{4}$ inch.

8 0
3 years ago
I’m stuck lol pls help
GarryVolchara [31]

Answer:

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Step-by-step explanation:

So, since x-20 is the vertical angle directly near 70, we can say:

x-20=70.

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HOPE IT HELPS!!!!!!!!!!!

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The correct answer is

20n: $120

$120

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2 years ago
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