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Sever21 [200]
3 years ago
14

Why did i get this wrong? What did i have to do to get the right answer?

Mathematics
1 answer:
aalyn [17]3 years ago
6 0
Will u did your math wong 
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Which of the following is an equation of the circle with a center at (-1,4) and a radius of 2√5 units? plss pahelp naman
Ksivusya [100]

Answer:

Option A

Step-by-step explanation:

The standard form of an equation of a circle is represented by the formula (x-h)^2+(y-k)^2 = r^2. Remember that (h,k) is the center and r^2 is the radius squared.

So, the equation of the circle must be (x+1)^2 +(y-4)^2 = 20. Complete the square to change the form of the equations listed in the options and find the one that is equal.

Let's try this with option A. Move the constants to the right side, then use the completing the square method to place the equation in standard form:

x^2 + y^2 +2x -8y -3 = 0\\x^2 + y^2 +2x-8y = 3\\x^2 + 2x +y^2-8y = 3\\(x^2 +2x+1)+(y^2-8y +16)=3+1+16\\(x+1)^2 + (y-4)^2=20

The end result matches with the equation determined before, so option A is the answer.  

8 0
3 years ago
Please do me explanation!
Zina [86]

Answer:

X=-22

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
This information is for credit card with a _______ APR.
otez555 [7]

Answer:

d. 0%

Step-by-step explanation:

4 0
2 years ago
Hydro Sunday in a right triangle the sum of the squares of the leg length is equal to the square of the high-profile tenseness l
Tresset [83]

Answer: hello your question is vague hence i will provide a more general answer

Area of a right angled triangle = 1/2 * b * h

Step-by-step explanation:

For a right- angled triangle; the sum of squares of the opposite and adjacent sides = square of the longest side ( i.e. hypothenuse )

hence the Area of a right angled triangle = 1/2 * b * h

where : b = adjacent , h = opposite side

7 0
3 years ago
Now move points C, D, and E on the circle, and note the interior angle measurements for the quadrilateral in the table below. No
labwork [276]

Answer:

Interior angle

measures of any n-gon, where n represents the

number of sides of the polygon, by multiplying

(n - 2) 180°.

Hope this helps :D

5 0
3 years ago
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