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Wewaii [24]
3 years ago
14

Suppose (12, 8) and (4, 6) are the endpoints of a diameter of a circle. Which is an equation of the circle?

Mathematics
1 answer:
In-s [12.5K]3 years ago
3 0

Answer:

(x-8)^2 + (y-7)^2 - 17 = 0

Step-by-step explanation:

The formula for the equation of a circle is:

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

where (h,k) is the center and r is the radius of the circle.

To first solve solve this, use the endpoints of the diameter to solve for the center of the circle using the midpoint formula, which is known as:

\frac{(x_1+x_2)}{2},\frac{(y_1+y_2)\ }{2}

The points given are (12,8) and (4,6), so plug in the coordinates into the formula.

Center = (1/2)(12+4),(1/2)(8+6)

            = (8,7)

Now, to find the radius, we can use the distance formula and use the center (8,7) and one of the endpoints, (12,8). The distance formula is known as:

\sqrt{(x_{1} -x_{2})^2 +(y_{1} -y_{2})^2 }

Radius = √(x₂- x₁)² + (y₂-y₁)²

            = √(12- 8)² + (8-7)²

            = √(4² + 1²) = √(16+ 1) = √17

            = r² = 17

Now that the radius and the center are known, the equation of the circle can be written as:

(x-8)^2 + (y-7)^2 - 17 = 0

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5 0
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Answer:

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2 years ago
59. What happens to the graph of y = |x| when the equation changes to y = |x + 4? A The graph shifts up 4 units. The graph shift
marishachu [46]

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Explanation:

I'm assuming you meant to say y = |x+4|

If so, then the graph shifts 4 units to the left. Replacing x with x+4 moves the xy axis 4 units to the right if we held the V shape in place (since each x is now 4 units larger). This gives the illusion the V shape is moving 4 units to the left.

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8 0
3 years ago
Solve the equation 0.35(x+4)=0.25(x-6)
creativ13 [48]
x = -29

because
0.35x +1.4=0.25x-1.5
-0.25x            -0.25x
_____________________
0.1x + 1.4 =  -1.5
         -1.4      -1.4
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5 0
3 years ago
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