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erik [133]
3 years ago
9

I need help with 2-3

Mathematics
1 answer:
alekssr [168]3 years ago
6 0

Answer:

1

Step-by-step explanation:

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Pleaseee helllpp meee​
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The answer is y = 0.5 x
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3 years ago
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If (3-4i) (x+iy) = 3 root 5<br> show that x^2 + y^2=9/5
NNADVOKAT [17]

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
The ratio of tin to copper in an alloy is 6:9. How many kg of copper are there if the alloy has 32 kg of tin? Make a ratio table
Artyom0805 [142]

Step-by-step explanation:

the three rows above you may draw as the ratio table

5 0
3 years ago
Edward went to the grocery store and bought some bro pounds of vegetables the vegetables cost 1.50 per pound. If he bought 3.25
Natali5045456 [20]

The cost of each vegetable is €1.50 per pound

Edward bought 3.25 pounds of carrot.

So the cost of 3.25 pounds of carrots = 3.25 × 1.50 = €4.875

He also purchased 1\frac{2}{10}= 1\frac{2}{5} =\frac{6}{5} pounds of beet.

Quantity of beet purchased = 6/5 = 1.2 pounds

So the cost of beet shall be = 1.50 × 1.2 = €1.80

He purchased 0.95 pounds of Broccoli

So the cost of Broccoli shall be = 0.95 × 1.50 = €1.425

Total amount spent = 4.875 + 1.80 + 1.425 = €8.10

Edward spent €8.10 on vegetables.


7 0
3 years ago
a farmer has eight and one six acres of land unplanted the farmer plants corn in three quarters of the remaining land how many a
dlinn [17]

Answer:

old mcdonald had a farm eee aye eee aye oooh

Step-by-step explanation:

And on that farm there was a dinosaur eee aye eee aye oooh with a RAwR RawR here and a rAWr RAWR there here a RawR there a rawR everywhere a RAwr rAWR ol mcdonald had a farm ee aye ee aye ohhhhhhhh

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