Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
moneybird
Group Title
Two different circles that pass through the point (1,3) are tangent to both coordinate axes. If the length of the radius of the smaller circle is "r" and the length of the radius of the larger circle of "R", what is the value of "r+R"?
 2 years ago
 2 years ago
moneybird Group Title
Two different circles that pass through the point (1,3) are tangent to both coordinate axes. If the length of the radius of the smaller circle is "r" and the length of the radius of the larger circle of "R", what is the value of "r+R"?
 2 years ago
 2 years ago

This Question is Closed

moneybird Group TitleBest ResponseYou've already chosen the best response.2
dw:1324082546573:dw
 2 years ago

Diarmuid_Wrenne Group TitleBest ResponseYou've already chosen the best response.1
trick is that the x and y values of the centers of the circles are the same and are also the same as the radii of the respective circles so (xr)^2 +(yr)^2 = r^2 stick in the know point (1r)^2 = (3r)^2 = r^2 0 = r^2 8a +10 solve and r = (8 +sqrt(24))/2 so r = 6.45 and 1.55 or so so r + R = 8 now I see why they asked for teh sum of the radii. It means you can ignore the sqrt ANS = 8
 2 years ago

Diarmuid_Wrenne Group TitleBest ResponseYou've already chosen the best response.1
the line above is wrong. should read (1r)^2 + (3r)^2 = r^2
 2 years ago
See more questions >>>
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.