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JulijaS [17]
3 years ago
12

What's the radius of a circle with an area of 64 square feet?

Mathematics
2 answers:
Tpy6a [65]3 years ago
8 0
The answer is 4.51.............
jeka943 years ago
7 0
The answer is A. 4.51 ft.
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Can someone please help me solve this?
aleksklad [387]

Answer:

centre = (-5, -4)

radius = 7.42

Step-by-step explanation:

The general form for center-radius is

(x - h)² + (y - k)²= r²

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Rearrange the equation.

(x² + 10x) + (y² + 8y) - 14 = 0

Add 14 on both sides.

(x² + 10x) + (y² + 8y) = 14

(10/2)² = 25

(8/2)² = 16

Add 25 and 16 to both sides.

(x² + 10x + 25) + (y² + 8y + 16) = 14 + 25 + 16

Factor left side of the equation.

(x+5)² + (x+4)² = 55

(55) = (7.416198)²

(x+5)² + (x+4)² = 7.42²

The radius is 7.42.

The centre is at (-5, -4).

8 0
3 years ago
Read 2 more answers
Taking a final exam rn and im stuck on this question, pls help ;-;
Effectus [21]
False true true.....
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3 years ago
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