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
Alenkinab [10]
3 years ago
14

Using the following equation, find the center and radius of the circle: x^2 + y^2 +2x − 4y − 20 = 0

Mathematics
1 answer:
DanielleElmas [232]3 years ago
6 0
You have to complete the squares on both the x terms and the y terms in order to solve this. Move the 20 over to the other side so it's negative. Group the x terms together and complete the square to get (x^2+2x+1) and then do the same with the y terms: (y^2-4y+4). You have to add 1 and 4 to other side with the 20 to get a 25. Then create 2 perfect square binomials within each x and y value to get the vertex coordinates: (x+1)^2 + (y-2)^2 = 25. This tells us that the vertex is located at (-1, 2) and the radius is the square root of 25 which is 5.So the answer is the first choice above.
You might be interested in
An ice-skating rink hosts different events on different days of the week they keep track of ages of the people who attended the
kirill [66]

Answer:

i think it is B

Step-by-step explanation:

4 0
3 years ago
Angle ABD and angle BDE are supplementary. Find the measures of both angles.
marishachu [46]
By definition of supplementary angles,
∠ABD + ∠BDE = 180
5x + 17x - 18 = 180
22x = 198
x = 9

∠ABD = 5(9) = 45°
∠BDE = 180 - 45 = 135°
3 0
3 years ago
What is the common factor between 536 and 10​
kap26 [50]

Answer:

im pretty sure it is 2

Step-by-step explanation:

4 0
3 years ago
If a student prefers nuts what is the approximate probability the students also prefers muffins
TiliK225 [7]

Answer:

36 hope this works!!!!!

6 0
3 years ago
Read 2 more answers
Cara evaluated the expression below.
Stolb23 [73]

Answer:

Cara multiplied only 4 and 7 together and did not multiply 4 and 13.

Step-by-step explanation:

She didn't distribute the 4 to both numbers inside the parenthesis. If she had done so, she would have gotten 28 - 42, <em>not</em> 28 - 13.

6 0
3 years ago
Read 2 more answers
Other questions:
  • In which quadrant is the number 6 – 8i located on the complex plane?
    13·2 answers
  • Jake completed a marathon race in 3 hours and 12 minutes. What would be Jake's running time as a decimal?
    5·1 answer
  • Fitzoom gym offers monthly memberships to its gym.
    6·2 answers
  • In the figure, m∥n
    5·1 answer
  • What does the line 5x + 4y = 6 look like? a.horizontal b.vertical c.tilted right upwards d.tilted right downwards?
    12·1 answer
  • Can anyone please help me with this RSM question? I have literally posted this like four times!
    11·2 answers
  • The difference of two numbers is more than 12,and one of the numbers is 3
    8·1 answer
  • The radius of the cylindrical construction pipe is 2.5ft, if the pipe is 25ft long, what is the volume? Use the value 3.14 for p
    12·2 answers
  • Plz help with my math
    8·2 answers
  • The list below shows the different taco shells, fillings, and toppings sold at Rico's Taco Bar.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!