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17-07-2020
Mathematics

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A circle is represented by the equation x2+y2=445. a) State the radius. b) Find y if point A(-9,y) is on this circle.

Respuesta :

17-07-2020

Answer:

R= sqrt 445

Y = 19

Step-by-step explanation:

Radius is the square root of 445

Find y

So, First step is to substitute what you have

-9^2 + y^2 = 445

81 + y^2 = 445

-81 -81

y^2 =364

Y is about 19

Let me know if I'm incorrect

Hope this helps :)

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