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2 years ago

Determine the center and radius of the following circle equation: x^2+y^2+20x+8y+35=0

Mathematics

1 answer:

natta225 [31]2 years ago

4 0

Answer:

center: (-10,-4)

radius: 9

Step-by-step explanation:

Let's start off by moving the 35 to the other side and grouping the x and y terms we have

(x²+20x)+(y²+8y)= -35

Next we take the term with the x coeficcent, divide it by 2, and square it

for the x we would do (20/2)²=100

and make sure we add that to the 35

(x²+20x+100)+(y²+8y+16)= -35+100+16

next factor everythign to get

(x+10)²+(y+4)²=81

therefore the center is (-10,-4)

and the radius is √81 or 9

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Answer: Option D

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We know that the cost of preschool is $ 45 per day plus a monthly fee of $ 70.

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To write an equation that represents this situation, let us call d the number of days that Barry attends school

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2 years ago

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9x^2 - 16x + 60
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Part B.
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2 years ago

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