A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Solve the system by the substitution method.
x2 + y2 = 113
x + y = 15
A. {( 8, 7), ( 7, 8)}
B. {( 8, 7), ( 7, 8)}
C. {( 8, 7), ( 7, 8)}
D. {( 8, 7), ( 7, 8)}
anonymous
 one year ago
Solve the system by the substitution method. x2 + y2 = 113 x + y = 15 A. {( 8, 7), ( 7, 8)} B. {( 8, 7), ( 7, 8)} C. {( 8, 7), ( 7, 8)} D. {( 8, 7), ( 7, 8)}

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@JoannaBlackwelder time for ya next medal lol

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Haha! Any thoughts on how to start?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah start subbing for the first equation to see wich one imakes it a true statement

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Hm, no, that's not what is meant by substitution.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439922974168:dw First solve for a variable.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok this is harder then i thought haha

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439923058436:dw Then sub it into the other equation.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Yeah, it can be tricky.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x² + (x15)² = 113 x² + (x  15)(x  15) = 113 x² + x² + 30x + 225 = 113 2x² + 30x + 112 = 0 2(x² + 15x + 56) = 0 2(x + 8)(x + 7) = 0 x = 8, 7 would this be right

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If x = 8, then 8 + y = 15 So y = 7 So a solution is (8, 7) If x = 7, then 7 + y = 15 y = 8 So a solution is (7, 8)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Hm, no, y=15x, not 15x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so go on with your explaing i thoght i had it atleast i tride un like the folks who just want answers haha

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1It looks like you have the right idea for the rest of it. You just messed up on defining y. Valiant effort! :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so can you correct me please

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1x² + (x+15)² = 113 See why?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Cool, what do you get from there?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Awesome! And what are the corresponding y values?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and thnx for your help once again

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1You're welcome :)
Ask your own question
Sign UpFind 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.