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Simora [160]
3 years ago
12

Using the following equation, find the center and radius of the circle. You must show all work and calculations to receive credi

t.
x2 − 4x + y2 + 8y = −4 (10 points)
Mathematics
1 answer:
Oxana [17]3 years ago
8 0

Answer:

Center: (-2, 4)

Radius: 4

Step-by-step explanation:

To find the centre and radius, we require to identify g , f and c

By comparing the coefficients of 'like terms' in the given equation with the general form.

2g = 4 → g = 2 , 2f = -8 → f = -4 and c = 4 → center=(−g,−f)=(−2,4)

radius = √22+(−4)2−4= √4+16−4=4

Center: (-2, 4)

Radius: 4

Hope This Helps! :)

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Plssss answer
vlada-n [284]

Answer:

C. Amount needed to fence around a circular garden

Step-by-step explanation:

The Circumference of a circle can be referred to as the length of the circle. It also called the perimeter of a circle.

The circumference of a circle can be defined as the distance roundabout a circle.

The circumference of a circle is calculated mathematically as:

a) 2πr or

b) πD

Where r = radius of the circle.

D = Diameter of the circle

From the above question, the situation can be modeled by circumference of a circle based on the definition that the circumference of a circle is the distance around a circle is Option C. "Amount needed to fence around a circular garden"

4 0
3 years ago
&lt;LMN Measures 67⁰<br>A)Acute angle<br>B)Obtune angle <br>C)Right angle<br>D)Straight angle
Lady_Fox [76]

Answer:

would it be acute

Step-by-step explanation:

5 0
3 years ago
Help answer for a b and c work all of it out and show your work!thanks. Use the picture.
frozen [14]
216.4 is the total cost added up. 

198.77 would be the subtraction of the answer above with the hardware supplies but subtraction would be wrong so you'd have to divide, dividing would get you to 0.0814, the you'll have to divide the decimal by 100 giving you 0.0815.

Do the same steps above but with the paint and hardware. 

52.91/216.4 gives you 0.244501, rounded up would give you 0.000245.

Add those two totals together to get your answer, 0.081745.

Sorry if I'm wrong. Hope this helps!

4 0
3 years ago
Evaluate the expression for the given value of x 3x-4;x=7
spin [16.1K]

Answer:

Answer = 17

Step-by-step explanation:

3x - 4

3(7) - 4

21 - 4

17

Hope this helps!

8 0
3 years ago
Which of the expressions can you use to find the number of 3-digit passwords you can make using the digits 5, 6, and 7, if you d
allochka39001 [22]
Hello,

Codes are :
5_6_7, 5_7_6

6_5_7,6_7_5

7_5_6,7_6_5

Choising the first (3 possibilities)
next choising the second (2 possibilities)
chosing the last  (1 possibility)

So 3*2*1=6

Answer A

5 0
3 years ago
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