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
alexandr402 [8]
3 years ago
6

What is the equation of the circle with center (5,-4) and containing the points (5,-2)

Mathematics
1 answer:
gtnhenbr [62]3 years ago
3 0

Answer:

The equation of a circle is (x-5)^2+(y+4)^2=4 .

Step-by-step explanation:

-The equation of a circle is:

(x-h)^2+(y-k)^2=r^2 (where center is (h,k), the point (x_{1},y_{1}) and the radius known as r).

-Use the center (5,-4) and the point (5,-2) for the equation:

(5-5)^2+(-2+4)^2=r^2

-Solve the equation:

(5-5)^2+(-2+4)^2=r^2

0 + (-2)^2=r^2

4 = r^2

\sqrt{4} = \sqrt{r^2}

2 = r

-After you found the radius, use the center (5, -4)  and radius 2 to get the equation of a circle:

(x-5)^2+(y+4)^2=2^2

-Then, after you have the equation, the radius needs to simplified by the exponent:

(x-5)^2+(y+4)^2=4

You might be interested in
1.<br> What is the mean for the following scores: 2, 5, 4, 1, 8?<br> A. 3<br> B. 4<br> c. 5<br> 20
atroni [7]

Answer to your question is:

B. 4

Explanation:

2 + 5 + 4 + 1 + 8 = 20

20 ÷ 5 = 4

8 0
3 years ago
Read 2 more answers
A regular decagon has 10 sides. How many reflectional symmetries does a regular decagon have?
lina2011 [118]

The rule for regular polygons are very easy. The number of reflectional symmetries is same as the number of sides. Regular polygons have all sides the same length and all angles same. Reflection symmetry means that you can fold the shape along that line and it will match up.

For this question, we want the number of reflectional symmetries of a regular decagon. Decagon is a 10 sided figure. Hence, the number of reflectional symmetries is 10.

There are 5 symmetry lines from one vertex to opposite vertex and 5 more symmetry lines form midpoint of one side to midpoint of opposite side.

ANSWER: 10

7 0
3 years ago
Read 2 more answers
Identify the graph of the equation. What is the angle of rotation for the equation?<br><br>xy=-2.5
Maurinko [17]

Answer:

It is B. hyperbola, 45 degrees.

SteIt is p-by-step explanation:

If we rotate the standard form  x^2 - y^2 = 1 through 45 degrees we get xy = 1/2.

xy = -2.5 comes from x^2 - y^2 = -5  being rotated 45 degrees.

3 0
3 years ago
Read 2 more answers
Write the slope intercept form of the equation of the line described.
Lady bird [3.3K]

Answer:

y= -5

Step-by-step explanation:

x=0 is a vertical graph hence the perpendicular graph would be a horizontal line, a y= ____ graph.

Since it passes through the point (-2, -5),

the equation of the line is y= -5.

This would be in slope- intercept form since the gradient of horizontal lines is zero.

y= mx +c, where m is the gradient and c is the y-intercept.

Given that gradient =0, m=0

y= 0x +c

when x= -2, y= -5,

-5= 0(-2) +c

-5= c

c= -5

Thus the equation is y= -5.

6 0
3 years ago
Find the area of a circle whose circumference is 18.84.
ivann1987 [24]

Answer:

310.23

Step-by-step explanation:

circumference is radius * 2

to get radius from circumference, divide circumference by 2

18.84 / 2 =9.42

area for circle:

pi * r^2

3.14 * 9.94^2

3.14 * 98.8

310.23

7 0
1 year ago
Other questions:
  • Is 15 a multiple of each of its factors
    6·1 answer
  • Can someone please help?! I’m confused!?
    15·1 answer
  • Sergio bought 1 yard of yellow yarn. he used 21 inches of this yarn for a project. what part of the yarn that he bought did he u
    12·1 answer
  • What is the inverse of f (x)=10-×^2
    12·1 answer
  • Simplyfly (-56) divided bye 7
    6·2 answers
  • If a bag contains 12 apples, 4 bananas, and 8 oranges, what is the part-to-whole ratio of apples to all fruit?
    15·1 answer
  • Determine the slope given the following information:
    12·1 answer
  • Find the length of the missing side. Round to the nearest hundredth.
    13·1 answer
  • Which expression is equal to 48 + 72?
    6·2 answers
  • Heres an ez question for yall
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!