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likoan [24]
3 years ago
12

HEEEEEEEELP PLZZZZ ILL GIVE U BRAINLIEST

Mathematics
1 answer:
borishaifa [10]3 years ago
7 0
A good rule is to change 10 to 15 percent of the water each week. If your tank is heavily stocked, bump that up to 20 percent each week. A lightly stocked aquarium can maybe get by for two to four weeks, but this should be the maximum length of time between water changes.
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Complete the square to rewrite x^2+y^2+2x+6y-6=0 in graphing form
Ksivusya [100]

Answer:

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Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

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Given

x² + y² + 2x + 6y - 6 = 0

Collect the x and y terms together and add 6 to both sides

x² + 2x + y² + 6y = 6

To complete the square

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

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with centre = (- 1, - 3) and r = \sqrt{16} = 4

4 0
3 years ago
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