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Elan Coil [88]
3 years ago
9

Write the equation for a parabola with a vertex of (-5,-4) and a focus of (-5,-2)

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
4 0

The equation of the parabola is (x + 5)² = 8(y + 4)

Step-by-step explanation:

Let us revise the equation of the parabola in standard form

  • The standard form is (x - h)² = 4p(y - k)
  • The vertex is (h , k)
  • The focus is (h, k + p)

∵ The vertex of the parabola is (-5 , -4)

- The coordinates of the vertex are (h , k)

∴ h = -5 and k = -4

∵ The focus is (-5 , -2)

- The focus is (h , k + p)

∴ k + p = -2

∵ k = -4

∴ -4 + p = -2

- Add 4 to both sides

∴ p = 2

- Substitute the values of h , k , p in the form of the equation

∵ The equation of the parabola is (x - h)² = 4p(y - k)

∴ (x - -5)² = 4(2)(y - -4)

∴ (x + 5)² = 8(y + 4)

The equation of the parabola is (x + 5)² = 8(y + 4)

Learn more:

You can learn more about the quadratic equation in brainly.com/question/9390381

#LearnwithBrainly

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sal is making bracalets for a fundraser he uses 6 inches of yarn per bracalet how many bracalets can sal make with 5 ft of yarn
Iteru [2.4K]

Answer:

10 bracelets

Step-by-step explanation:

we need to convert 5 ft to inches

1 ft = 12 inches

multiply by 5

5 ft = 60 inches

60 inches of yarn, 6 inches per bracelet

60/6 = 10

10 bracelets

6 0
3 years ago
What are the coordinates of the point (−1, 6) after a reflection across the x-axis?
Agata [3.3K]
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The temperature has been going down at a constant rate. In 3 hours it went down 15 degrees. Which expression best shows the temp
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6 0
3 years ago
Which graph represents the function of f(x) = 9x 2 -36/3x+6 Please help
UkoKoshka [18]
The function is:

             (9x^2 - 36)
f(x) = ---------------------
                3x + 6

You can simplify that function to a linear function for all x for which 3x + 6 ≠ 0

=> x ≠ - 2.

So, for x ≠ - 2, you can do:


             (9x^2 - 36)
f(x) = --------------------- =
               3x + 6

              9(x^2 - 4)
f(x) = ---------------------
                3(x + 2)

             3(x + 2)(x - 2)
f(x) = --------------------- = 3(x - 2) = 3x - 6
                 (x + 2)

So, the graph is a right line that intercepts the y-axis at - 6 and the x-axis at x = 2, excluding x = -2 as the function is not defined for x = -2. That is the second graph of the second picture.


6 0
3 years ago
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