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disa [49]
3 years ago
10

How can the equation of a parabola be derived when given the focus and the directrix

Mathematics
1 answer:
erica [24]3 years ago
7 0
If the focus<span> of a </span>parabola<span> is and the </span>directrix<span> is , find the</span>equation<span> of the </span>parabola. Let ( x 0 , y 0 ) be any point on theparabola. Find the distance between ( x 0 , y 0 ) and the focus. Then find the distance between ( x 0 , y 0 ) and directrix<span>.</span>
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Step-by-step explanation:

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The length of a rectangle is 5 cm more than its width. The perimeter is 82 cm. Find the length of the rectangle.
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We will represent the length of the rectangle as l and the width as w.


From this problem, we can say l = w + 5. We can also deduct an equation from the second sentence:

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\boxed{w = 18}


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l = 18 + 5

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The length of the rectangle is 23 cm and the width of the rectangle is 18 cm.

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