3 years ago

Eight equals r to the power of two

Mathematics

1 answer:

Tasya [4]3 years ago

5 0

Answer:

r= $2\sqrt{2}$

r= - $2\sqrt{2}$

Step-by-step explanation:

8= $r^{2}$

Square root both sides of the equation.

r= $2\sqrt{2}$

r= - $2\sqrt{2}$

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Type the correct answer in each box. A circle is centered at the point (5, -4) and passes through the point (-3, 2). The equatio

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Answer:

$(x+ \boxed{-5})^2+(y+\boxed4)^2=\boxed{100}$

Step-by-step explanation:

Given:

Center of circle is at (5, -4).

A point on the circle is $(x_1,y_1)=(-3, 2)$

Equation of a circle with center $(h,k)$ and radius 'r' is given as:

$(x-h)^2+(y-k)^2=r^2$

Here, $(h,k)=(5,-4)$

Radius of a circle is equal to the distance of point on the circle from the center of the circle and is given using the distance formula for square of the distance as:

$r^2=(h-x_1)^2+(k-y_1)^2$