Algebra

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Could you please check some of my Algebra problems please?

Write the standard form of the equation of the circle with the given center and radius.

1. (-7,4);8
I got (x+7)^2 + (y-4)^2=64

2. (-7,10); square root of 17
I got (x+7)^2 + (y-10)^2=17

3. (0,0); 2 square root of 2
I got x^2+y^2=8

Find the center and the radius of the circle

7. (x-4)^2 + (y-1)^2=9
I got (4,1) as the center and the radius 3.

  • Algebra -

    all correct.

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