The equation of the line that is tangent to the circle at (8, -2) is:
We know that the line which is tangent at a point on a circle is perpendicular to the line joining the center of the circle and that point.
Here we are given the equation of a circle as:
The center of the circle is at: (3,-2)
( Since, the standard form of a circle with center at (h,k) and radius r is given by:
)
Also, the equation of a line joining (3.-2) and (8,-2) is given by:
Also, we know that the slope of this line is zero.
Also, we know that if two lines are perpendicular with slope m and m' respectively then,
Hence, we get that the slope of the tangent line is:
Also, we know that:
The equation of a line with given slope m' and a passing through point (a,b) is given by:
Here (a,b)=(8,-2)
and
i.e. the equation of the tangent line is:
18
19
20
The area of polygon is 18 sq. units.
In geometry, a polygon is any closed curve made up of a collection of continuous line segments, without any intersections. Triangles (three sides), quadrilaterals (four sides), and pentagons.
Given that jack has a model f(x) = x² + 2x +3
where f(x) is area of polygon and x shows length of side
area when length is 3
substitute value of x in equation
f(x) = x² + 2x +3
f(3) = 3² + 2ₓ3 + 3
f(3) = 9 + 6+ 3
f(3) = 18
Hence area of polygon according to given equation is 18 sq. units
Learn more about polygon
#SPJ5
Answer:
Step-by-step explanation:
20. First find the values of the numbers being added.
These numbers have a common denominator, so you can add the numerators
27 + 25 = 52
so the number comes out to
to simplify, divide the numerator and denominator by 4.
So the final fraction becomes
However the question doesn't have this answer and now I am confused. I assumed that the expression was but the picture is a little bit blurry and I have bad eyesight so let me know if it is not. I'm too tired to delete this so next problem.
21.
4x + 8x + 7 + 4
Combine the like terms to get the expression
12x + 11 the answer is c.
Answer:
x = 8
Step-by-step explanation:
First: Subtract 8x from both sides
You will be left with 3x = 24
then divide 3 from both sodes
you will be left with x=8