(4, 1)
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
There is no "equals" sign therefore "x-9" is NOT an equation.
Radius = 1111
x2 + y2 = 2r2
x^2+y^2=36
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
There is no "equals" sign therefore "x-9" is NOT an equation.
Radius = 1111
x2 + y2 = 2r2
x^2+y^2=36
The slope is -4
To check this, you substitute the values for x and y into the equation. At (1,2) x equals 1 and y equals 2 so substituting this in we get: x + 2y = 1 + 2(2) = 1 + 4 = 5 And since it equals 5 like in the original equation the point is represented by it.
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.
9
7
8
x2 + y2 = 49