178k views
1 vote
Please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!-example-1

1 Answer

3 votes

9514 1404 393

Answer:

the correct answer is marked

Explanation:

The circle with center (h, k) and radius r has equation ...

(x -h)² +(y-k)² = r²

For the given center, that is ...

(x -1)² +(y +1)² = r²

The value of r² can be found by using the given point for x and y, and seeing what value of r² makes the equation true.

(5 -1)² +(7 +1)² = 4² +8² = 16 +64 = 80

So, r² = 80 makes the equation true, and that equation is ...

(x -1)² +(y +1)² = 80

User Jansen
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories