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Bas_tet [7]
3 years ago
11

1)Find the center & radius for the following

Mathematics
1 answer:
postnew [5]3 years ago
4 0
The general equation of circles is (x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center. 
1. 2x^2+2y^2=72 =x^2+y^2=36  c: (0,0); r = 6
2. (x-3)^2+(y-1)^2=4 : c: (3,1); r = 2
3. (x-5)^2+(y+2)^2=49;  c: (5,-2); r = 7
4. (y-4)^2+(x-10)^2=64:  c: (4,10); r = 8
5.(x^2-6x+9)+(y^2+8y+16)=1:  c: (3,-4); r = 1
6. x^2+12x+y^2-8y=-27 =<span>x^2+12x + 36+y^2-8y+16=-27+36+16=25:
 c( -6,4); r = 5</span>
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3 years ago
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2 years ago
I need the answer help<br>​
lisov135 [29]

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the second one(20)

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If you pretend 20 is x, you solve the equation by pluging in x (20) into the equation and it gives you 70, 70 is what the big part is and 70+20 is 90, which is the size of a 90degree side.

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means the volume of water in the pool 10 minutes after they start is greater than it is 5 minutes after they start. In short, <em>they are filling the pool</em>.

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