A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 one year ago
which is not a point on the circle x^2+(y5)^2 =25?
a.(0,5)
b. (5,5)
c. (5,0)
d.(3,9)
 one year ago
which is not a point on the circle x^2+(y5)^2 =25? a.(0,5) b. (5,5) c. (5,0) d.(3,9)

This Question is Closed

ByteMe
 one year ago
Best ResponseYou've already chosen the best response.0plug in those points and see which one holds true

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2\(x^2+y^2 = r^2\) is the equation of a circle with radius \(r\) centered at the origin. In this case, \(r^2=25\) so the radius of the circle is \(5\) because \(5^2 = 25\). When we subtract or add something to \(x\) or \( y\) before squaring it, it has the effect of shifting the circle by the amount added or subtracted along the axis corresponding to the variable where we added or subtracted. Subtracting 5 from \(y\) has the effect of shifting the circle up by 5.

frederickinrio
 one year ago
Best ResponseYou've already chosen the best response.0resposta = d.(3,9) and so replace the x and y

dquinao
 one year ago
Best ResponseYou've already chosen the best response.0@ByteMe is the answer c?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Come on, this is easy if you sketch the circle. dw:1361068806890:dw Now shift everything up by 5 (add 5 to the y value). Which point doesn't belong?

ByteMe
 one year ago
Best ResponseYou've already chosen the best response.0yes... (5, 0) is NOT in the circle: \(\large x^2+(y5)^2 =25 \) you are correct.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2dw:1361068902180:dw

dquinao
 one year ago
Best ResponseYou've already chosen the best response.0@whpalmer4 is the answer is d?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2No, the answer is that (5,0) is a point not on the circle, as you can see from the diagram.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2(3,9) you would have to check by substituting it in the equation, but given that the format of the question tells you that only one of the points isn't on the circle, it's clear that (5,0) is the only one.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2In general, it's useful to understand how adding and subtracting inside the squared terms moves the figure around. Much easier to recognize the effect than to figure it out by laboriously plotting values! :)
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.