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
How to find area of a rectangle?
anyanavicka [17]

Formula

Area = L*w


Hint : To find the area of a rectangle , multiply the length times the width


I hope that's help !


4 0
3 years ago
HELP WITH MY ANNOYING MIDDLE SCHOOL MATH PLEASEEEEEE!!!!!!<br> WILL GIVE BRAINLIEST!!!!!
AlladinOne [14]

Answer:

I cant see the question its very blurry

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
What is this functie<br> f(x) = 2x + 5
Aloiza [94]
Slope function
Hope this will help!
8 0
3 years ago
Read 2 more answers
Solve for x: x - 2 = 10
larisa86 [58]

Answer:

x=12

Step-by-step explanation:

you just have to add 2 to both sides to get x by itself and 10+2=12. therefore, x=12

8 0
3 years ago
Read 2 more answers
Help I’m very confused and was wondering if anyone is willing to help.
beks73 [17]

Answer:

57°

Step-by-step explanation:

LHS angle=RHS angle=57° (vert. opp angles)

5 0
3 years ago
Other questions:
  • Write a decimal as a fraction in simplest form -0.25
    6·2 answers
  • Find f(2) and f(a+h) when f(x)=3x^2+2x+4
    8·1 answer
  • I need help with number 6c
    11·1 answer
  • Mr. May invested $21,000, part at 8% and the rest at 6%. If the annual income for from both investments were equal find the amou
    7·1 answer
  • what is the relative frequency of a customer 40 years or older getting information from the internet? A.) 0.182 B.)0.222 C.)0.25
    8·2 answers
  • Kayden was offered a job that paid a salary of $39, 500 in its first year. The salary
    12·1 answer
  • Factor out the GFC from of the terms of the polynomial 2x^3-5x^2+25
    10·1 answer
  • Is the ordered pair given a solution to the equation.
    9·1 answer
  • Help i am giving brainliest out! :)
    10·1 answer
  • I need help somebody please​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!