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
Gnom [1K]
3 years ago
6

What is the radius for the circle given by the equation x^2+(y -3)^2 = 21

Mathematics
2 answers:
Leviafan [203]3 years ago
8 0

Answer:

4.583

Step-by-step explanation:

The equation for the radius r of a circle can be found from

(x – h)2 + (y – k)2 = r2,

Where h and k are the center points along the x and y axis respectively.

Comparing with the equation given;

x^2+(y -3)^2 = 21

h = 0, y = 3 and r^2 = 21

r = √21

= 4.583 (to the nearest thousand)

Note that unit of measurement may apply where given.

MatroZZZ [7]3 years ago
3 0

\bf\textit{equation of a circle}\\\\(x- h)^2+(y- k)^2= r^2\qquadcenter~~(\stackrel{}{ h},\stackrel{}{ k})\qquad \qquadradius=\stackrel{}{ r}\\\\[-0.35em]\rule{34em}{0.25pt}\\\\x^2+(y-3)^2=21\implies (x-0)^2+(y-3)^2=(\sqrt{21})^2\qquad \begin{cases}center~(0,3)\\r=\sqrt{21}\end{cases}\\\\\\r\approx 4.58257569495584000659\implies r = \stackrel{\textit{rounded up}}{4.583}

You might be interested in
Which number line can be used to find the distance between (4, -1) and (8. - 1)?
____ [38]
I don’t really no this answer? Sorry
8 0
3 years ago
Jonah is making a model house. The real house is 22 feet tall. His model is 10 inches tall. What is the foot : inch ratio for hi
Bumek [7]

Answer:

11: 5

Step-by-step explanation:

22 feet: 10 inches     Reduce.     22/10 = 11/5

6 0
2 years ago
It is 3 miles around Westwood Park exercise trail. After skating around the trail 5½ times, Mr. Zorn lost a wheel. How many mile
mart [117]
I hope this helps you




5 1/2=5.2+1/2=11/2



3.11/2


33/2


15 3/2


16,5
4 0
3 years ago
Solve the equation. −13m − 7 = 5
andrew-mc [135]
-13m = 5+7
m = 12/-13
3 0
3 years ago
In the graph shown, which ordered pair does NOT represent a solution to the graph?
andreyandreev [35.5K]
A) (1, 7) Doesn't
B) (0, 4) Doesn't
C) (2, –2) Doesn't
D) (3, –5) DOES

All the steps are right at the exception of line 7 (and onwards)

line 6 : 6x = 42 (it's right). Now divide both sides by 6:

line 7 should be:  6x/6 = 42/6
line 8 should be: x = 7. 

8 0
3 years ago
Read 2 more answers
Other questions:
  • (40 POINTS, WILL GIVE BRAINLIEST) There are 4 transformations for each function.
    9·1 answer
  • The integers between 2 and 6
    7·1 answer
  • Evaluate exactly in radians: arctan(1/sqrt(3)).
    6·1 answer
  • What is the 4 math methods
    15·1 answer
  • Marilyn saves 30% of the money she earns each month.She earns $350 each month.How much does she save?​
    12·1 answer
  • What is the discontinuity of the function f(x)= x^2-4x-12/x+2. PLEASE ASAP WILL GIVE BRAINLIEST!
    6·1 answer
  • Your small business spent $40 on food and another $60 on materials. Then, you sold an item for $120, but you had to pay a $90 se
    12·1 answer
  • F(x) = x^2 . What is g(x)​
    11·1 answer
  • Calculate 20% of R400​
    10·1 answer
  • Determine if 0.95929409956639... is rational or irrational and give a reason for your answer.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!