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Maslowich
3 years ago
13

Solve the inequality and type the inequality notation 79-8x > 119​

Mathematics
1 answer:
mart [117]3 years ago
7 0

Answer:

x > -5

Step-by-step explanation:

subtract 119-79=40 then you divide 40÷-8=-5

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Help quick <br> WILL GIVE BRAINLY
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If (3-4i) (x+iy) = 3 root 5<br> show that x^2 + y^2=9/5
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Answer:

the answer is 2 + i.

Step-by-step explanation:

Let the square root of 3 + 4i be x + iy.

So (x + iy) (x +iy) = 3 +4i

=> x^2 + xyi + xyi + i^2*y^2 = 3 + 4i

=> x^2 – y^2 + 2xyi = 3 + 4i

Equate the real and complex terms

=> x^2 - y^2 = 3 and 2xy = 4

2xy = 4

=> xy = 2

=> x = 2/y

Substitute in

=> x^2 - y^2 = 3

=> 4/y^2 - y^2 = 3

=> 4 – y^4 = 3y^2

=> y^4 + 3y^2 – 4 = 0

=> y^4 + 4y^2 – y^2 – 4 =0

=> y^2(y^2 + 4) – 1(y^2 + 4) =0

=> (y^2 – 1) (y^2 + 4) =0

Therefore y^2 = 1, we ignore y^2 = -4 as it gives complex values of y.

Therefore y = 1 and x = 2/1 = 2

The required square root of 3 + 4i is 2 + i.

5 0
3 years ago
Oaklands zoo has two elephants. The male elephant weighs 3/4 a ton and the female elephant weighs 1/4 of a ton. How much does th
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so if you take away 1/4 from 3/4 you will get 2/4

3/4 - 1/4 = 2/4 or 1/2

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4 years ago
You need 100L of a solution that is 12% alcohol. You have a 5% alcohol solution and a 15% alcohol solution. How much of each sho
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Answer:

You would have 32% of alcohol and still have 100L of a solution.Because i took the test.

Step-by-step explanation:

12%+5%+15%=

17%+15%=

32%

4 0
4 years ago
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