judyandaub1
04.02.2020 •
Mathematics
What is the equation of the circle that has a center at (-3, 1) and a radius of 5? a) (x + 3)2 + (y - 1)2 = 5 b) (x - 3)2 + (y + 1)2 = 5 c) (x + 3)2 + (y - 1)2 = 25 d) (x - 3)2 + (y + 1)2 = 25
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Ответ:
C
Step-by-step explanation:
The vertex form of the equation of a circle is where (h,k) is the center of the circle and r is the radius. This means that for the circle with center (-3,1) and radius 5 substitute into the vertex form these values. Substitute h = -3, k= 1, and r = 5. The equation becomes . This simplifies to . The solution is C.
Ответ:
Therefore, abs(-8 7/11)= 8 7/11~