Given the following information: a circle with a radius of 10cm and has a center of (-9, -2).

a. find the equation of the circle.

b. list four points (integers) that are on the circle.

c. is the point (-3, 6) on this circle?

Equation: (x+9)² + (y+2)² = 100

4 points: (1, -2) (-1, 4), (-3, -10) (-19, -2)

(-3, 6) is on the circle

Step-by-step explanation:

(h, k)  (-9, -2)

Equation: (x+9)² + (y+2)² = 100

4 points: (1, -2) (-1, 4), (-3, -10) (-19, -2)

(-3, 6) is on the circle

check: (-3 + 9)² + (6 + 2)² = 36 + 64 = 100 = 10²

Part a.

r = 10 is the radius

(h,k) = (-9,-2) is the center

The general circle equation is

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

Plugging the given values into that equation gives us this

(x-(-9))^2 + (y-(-2))^2 = 10^2

(x+9)^2 + (y+2)^2 = 100

=================================

Part b.

Four easy points we can find are the points that are aligned on the north, east, south and west parts of the circle.

Start at (-9,-2) which is the center of the circle. Move up 10 units and you'll get to (-9,8) which is the point at the northern most part of the circle. We move 10 units because this is the radius.

Go back to the center (-9,-2). Move 10 units to the right and you'll arrive at (1,-2)

Go back to the center again and move 10 units down to get to (-9,-12)

Finally, go back to the center and move 10 units to the left to arrive at (-19,-2)

=================================

Part c.

The point (-3,6) has x = -3 and y = 6 pairing up.

Plug these values into the equation we found back in part a.

Then simplify both sides. If we get the same number on each side, then we will have a true equation and that will confirm (-3,6) is on the circle. Otherwise, we get a false equation and the point is not on the circle.

-------

(x+9)^2 + (y+2)^2 = 100

(-3+9)^2 + (6+2)^2 = 100

(6)^2 + (8)^2 = 100

36 + 64 = 100

100 = 100

We get the same thing on both sides, so we have a true equation and (-3,6) is on the circle.

-------

Below is the graph showing this point on the circle along with the other four points found earlier back in part b.

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is