91影视

Write the standard form of the equation of the circle with center $(2,1)$ that also contains the point $(鈭�2,鈭�2)$.

Write the standard form of the equation of the circle with center $(7,1)$ that also contains the point $(-1,-5)$.

鈸� Find the center and radius, then 鈸� graph the circle:${(x-3)}^2+{(y+4)}^2=4$

鈸� Find the center and radius, then 鈸� graph the circle:${(x-3)}^2+{(y-1)}^2=16$

(a) Find the center and radius, then (b) graph the circle:$3x^2+3y^2=27$

(a) Find the center and radius, then (b) graph the circle:$5x^2+5y^2=125$

(a) Find the center and radius, then (b) graph the circle: $x^2+y^2-6x-8y+9=0$

In the following exercises, find the sum of the first 30 terms of each arithmetic sequence.

鈭�15, 鈭�12, 鈭�9, 鈭�6, 鈭�3, 鈥�

In the following exercises, find the equation of the ellipse shown in the graph.

Use the rectangular coordinate system to find the distance between the points $(5,3)$ and $(-3,-3)$.