Question

Find the length of the radius of the given circle.

(x - 5)2 + (y + 3)2 = 25

5
12.5
25

Please help

Answer 1

B

Answer 2

How did you get that?

Answer 3

Let's solve for x.
(x−5)(2)+(y+3)(2)=25
Step 1: Add 4 to both sides.
2x+2y−4+4=25+4
2x+2y=29
Step 2: Add -2y to both sides.
2x+2y+−2y=29+−2y
2x=−2y+29
Step 3: Divide both sides by 2.
2x2=−2y+292
x=−y+292
Answer:
x=−y+29/2
29/2=14.5
14.5/2= 7.25
7.25/2=12.5

Answer 4

@karatechopper is that correct??

Answer 5

want me to explain it better?

Answer 6

2x/2=−2y+29/2

Let's solve for x.
(x−5)(2)+(y+3)(2)=25
Step 1: Add 4 to both sides.
2x+2y−4+4=25+4
2x+2y=29
Step 2: Add -2y to both sides.
2x+2y+−2y=29+−2y
2x=−2y+29
Step 3: Divide both sides by 2.
2x/2=−2y+29/2
x=−y+292
SIMPLIFY:
29/2=14.5
14.5/2= 7.25
7.25/2=
Answer:
12.5

Answer 7

that's the best I can explain.

Answer 8

It is correct.

Answer 9

The equation of a circle is,
(x−h)^2+(y−k)^2=r^2
So if we look at the given equation of the problem,
(x - 5)2 + (y + 3)2 = 25
Which part of the given equation gives you a hint about the radius in reference to out model equation of the circle?

Answer 10

@vbroberson I humbly don't agree with your answer.

Answer 11

@karatechopper How did I get it wrong then?

Answer 12

Vbroberson I will dm you.
Jc can you answer the question I had above here?

Answer 13

Okay.

Answer 14

I see where I messed up.

Answer 15

The radius would be 5