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spayn [35]
3 years ago
5

12. The Appalachian Trail is about 2,175 miles long.

Mathematics
1 answer:
spayn [35]3 years ago
6 0
a. (2175 mi)/(18 mi/day) = 120.83... day ≈ 121 days

b.
120.83.../4 = 30.2083...
   Joelle will hike 30 full days and one partial day.
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galina1969 [7]
<h2>Hello!</h2>

The answer is:

Center: (-4,-4)

Radius: 2 units.

<h2>Why?</h2>

To solve the problem, using the given formula of a circle, we need to find its standard equation form which is equal to:

(x-h)^{2}+(y-k)^{2}=r^{2}

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So, we need to complete the square for both variable "x" and "y".

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x^{2}+y^{2}+8x+8y+28=0

So, solving we have:

x^{2}+y^{2}+8x+8y=-28

(x^2+8x+(\frac{8}{2})^{2})+(y^2+8y+(\frac{8}{2})^{2})=-28+((\frac{8}{2})^{2})++(\frac{8}{2})^{2})\\\\(x^2+8x+16 )+(y^2+8y+16)=-28+16+16\\\\(x^2+4)+(y^2+4)=4

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Have a nice day!

Note: I have attached a picture for better understanding.

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Simplify the variable expression below as much as possible. 3x + 4 + 9 - 6
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