All categories

4 years ago

I really need help

Mathematics

1 answer:

Zielflug [23.3K]4 years ago

3 0

Answer:

The answer is (C)

The equation of the circle is (x + 4)² + (y - 6)² = 81

Step-by-step explanation:

* To find the equation of the circle you need to know

the center of the circle and the length of its radius

* The rule of the equation of the circle is:

(x - h)² + (y - k)² = r²

Where x and y is a general point on the circle,

h and k are the coordinates of the center of the circle

and r is the radius of the circle

∵ The center of the circle is (-4 , 6)

∵ The radius of the circle is 9

∴ (x - -4)² + (y - 6)² = 9²

∴ ( x + 4)² + (y - 6)² = 81

∴ The answer is (C)

You might be interested in

6(X+1) - 3 = 6X - 7<br> need answer asap

Stolb23 [73]

Answer:

No solution

Step-by-step explanation:

There are no values of x that make the equation true; hence making it have no solution.

8 0

3 years ago

Ditch Digging Problem Doug Upp can dig a ditch in 3 hours. His

Rasek [7]

It’s definitely less than 8 because when two people work together it takes less time

8 0

3 years ago

The coordinates of the turning point of the parabola whose equation is y = x2 — 6x + 8 are A. (3, 35) C. (-3, 35) B. (-3, —1) D.

quester [9]

Answer:

D. (3. —1)

Step-by-step explanation:

Vertex of a quadratic function:

Suppose we have a quadratic function in the following format:

$f(x) = ax^{2} + bx + c$

It's vertex is the point $(x_{v}, y_{v})$

In which

$x_{v} = -\frac{b}{2a}$

$y_{v} = -\frac{\Delta}{4a}$

Where

$\Delta = b^2-4ac$

If a<0, the vertex is a maximum point, that is, the maximum value happens at $x_{v}$ , and it's value is $y_{v}$ .

Turning point of a quadratic function:

The turning point of a quadratic function is the vertex.

y = x2 — 6x + 8

This means that $a = 1, b = -6, c = 8$

Now, we find the vertex.

$x_{v} = -\frac{b}{2a} = -\frac{-6}{2(1)} = 3$

$\Delta = b^2-4ac = (-6)^2-4(1)(8) = 36 - 32 = 4$

$y_{v} = -\frac{4}{4(-1)} = -1$

(x,y) = (3,-1), and the correct answer is given by option D.

6 0

3 years ago

X + y = 3<br> 4x + 4y = -12

Stolb23 [73]

Answer:

oop

Step-by-step explanation:

4x+4y-4=-12-4

then you get the answer for x

6 0

3 years ago

0.1212 as a fraction

marishachu [46]

0.1212 as a fraction is 303/2500.

3 0

3 years ago