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prohojiy [21]
3 years ago
7

Can someone help me ?

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
7 0

Answer:

2nd choice

Step-by-step explanation:

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Pls help i am on a timer
stich3 [128]

Answer:

x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Step-by-step explanation:

Given;

x² - 2x - 1 = 0

Solve by completing the square method;

⇒ take the constant to the right hand side of the equation.

x² - 2x = 1

⇒ take half of coefficient of x = ¹/₂ x -2 = -1

⇒ square half of coefficient of x and add it to the both sides of the equation

x^2 +  (-1)^2 = 1 + (-1)^2

(x-1)^2 = 1 + 1\\\\(x-1)^2 = 2\\\\

⇒ take the square root of both sides;

x-1 = +/- \ \ \sqrt{2} \\\\x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Therefore, option B is the right solution.

3 0
2 years ago
Is this less than <br> Greater than<br> Or equal too?
kkurt [141]
The values are equal.

Root 5.76= 2.4

-2.4=-2.4
4 0
3 years ago
I need help please... I'll mark you brainiest!!! Thanks!
lys-0071 [83]

Multiply the weight in tonnes by the conversion factor ( 1 tonne = 1000 kg) to get the weight in kg's:

170 tonnes x 1000 = 170,000

Now convert to scientific notation, by moving the decimal point to have only 1 digit to the left of the decimal.

To do this, you would need to move the decimal 5 places to the left to get 1.70000

Now remove the 0's and multiply the number by 10 raised to the number of paces the decimal was moved to get:

1.7 x 10^5 kg's.

5 0
3 years ago
Please help if possible. Thank you!
Shtirlitz [24]

Answer:15 pi

Step-by-step explanation:

The scope is 10(r)*2*pi

XPY is 3 quarters of the slope, which equals to 0.75*20*pi=15pi

6 0
3 years ago
Read 2 more answers
For what values of x and y would AABC-ADEF?
Murrr4er [49]
C
hope this helped!!!
8 0
3 years ago
Read 2 more answers
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