1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mazyrski [523]
3 years ago
9

What are the center and radius of the circle defined by the equation x^2 + y^2 -6x + 8y + 21=0

Mathematics
1 answer:
NeTakaya3 years ago
7 0

Answer:

Step-by-step explanation:

(x²-6x)+(y²+8y)=-21

(x²-6x+9)+(y²+8y+16)=-21+9+16

(x-3)²+(y+4)²=4

center=(3,-4),radius=√4=2

You might be interested in
If the coordinates of A are (1, 1) and the midpoint of AB is
yuradex [85]

Answer:

The coordinates of B are (-5, -1).

Step-by-step explanation:

You can make a linear relationship. Since AB is <em>1 unit down and 3 units to the left of</em> A, B must be <em>1 unit down and 3 units to the left of</em> AB.

5 0
3 years ago
A cake has two layers. Each layer
Fed [463]

Answer:

Volume of slice is  40 in³

Volume of the remaining cake is 197.014 in³

Step-by-step explanation:

hope this helps!!

brainliest please?

7 0
3 years ago
What must be added to both sides in 4x² + 24x + 8 = 32 in order to complete the square?
Sergeu [11.5K]

Answer:

16

Step-by-step explanation:

To solve a quadratic equation by using the completing the square method, the coefficient of the square term i.e x² must be one (1).

Therefore, we would have to first make the coefficient of x² to be equal to 1.

4x² + 24x + 8 = 32

We would simplify the equation;

4x² + 24x = 32 - 8

4x² + 24x = 24

Divide all through by 4;

x² + 8x = 24

The value to be added = (8/2)² = 4² = 16

x² + 8x + 16 = 8 + 16

x² + 4x + 4x + 16 = 24

x(x + 4) + 4(x + 4) = 24

(x + 4)² = 24

Taking the square root of both sides;

x + 4 = ± 4.9

x = -4 ± 4.9

x = -4 + 4.9 = 0.9

or

x = -4 - 4.9 = - 8.9

<em>Therefore, 16 must be added to solve the quadratic equation by completing the square method. </em>

6 0
3 years ago
A
snow_tiger [21]

Answer: 76

Step-by-step explanation:

47+3= 50

19+7=26

50+26=76

Where's the Bar Diagram?

Hope this Helps!

4 0
3 years ago
Your drawer contains 10 red socks and 11 blue socks. It's too dark to see which are which, but you grab two anyway. What is the
beks73 [17]
For red there would be 1/22 and for blue there would be 1/22
6 0
4 years ago
Read 2 more answers
Other questions:
  • Choose the point-slope form of the equation below that represents the line that passes through the point (6, -3) and has a slope
    7·1 answer
  • Use the summation formula to find a partial sum of a series with the following properties
    12·1 answer
  • AYOOO HELPPPPP MATHHHH......? THANKKK UUUUU
    13·1 answer
  • HELP ME WITH THIS MATHS QUESTION<br> IMAGE IS ATTACHED
    15·1 answer
  • How many times doe 56 go into 512
    10·2 answers
  • Find the perimeter of the shape shown below. ILL GIVE BRAINLIEST
    12·2 answers
  • If 2^x3^y=18 and 2^x×3^y=36 then find the value of x and y​
    8·1 answer
  • I need help rounding numbers to the nearest tenth, hundredth and thousandth
    9·1 answer
  • Hi guys I need help rq with this thanks
    15·1 answer
  • How do I do this??????? 2/3x-(1/2x+1)<br>btw need it simplified
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!