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dalvyx [7]
3 years ago
8

PLEASE HELP!!

Mathematics
1 answer:
Katena32 [7]3 years ago
3 0
The formula for a regular polygon, which this one is, is A = 1/2 ap where a is the apothem and p is the perimeter.  20.8 * 7 = 145.6 which is the perimeter, so now just multiply by 21.6 and .5.  145.6 * 21.6 * .5 = 1572.48, or B above.
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Answer:

see explanation

Step-by-step explanation:

I will begin with part two, first.

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius.

Given

x² - 18x + y² - 10y = - 6

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add ( half the coefficient of the x/ y terms )² to both sides

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There is a pair of x and y values that make each equation true in this system of equations
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