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trapecia [35]
3 years ago
5

Amy is going on a 4 1/4 mile hike She has already hiked 2 3/4 miles. How many more miles does she have left to hike?

Mathematics
1 answer:
babymother [125]3 years ago
5 0

Answer:

2 1/4 left to hike

Step-by-step explanation:

2+2=4         3+1=4

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Derive the equation of the parabola with a focus at (0, −4) and a directrix of y = 4.
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<u>Answer:</u>

y=-\frac{1}{16} x^2

<u>Step-by-step explanation:</u>

Equation of parabola with focus at (0,-4) and directrix is y=4.

We know that parabola is the locus of all the points such that the distance from fixed point on the parabola to fixed line directrix is the same.

The parabola is opening downwards.

Let any point on parabola is (x,y).

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(x)^2+(y+4)^2=(y-4)^2

x^2+(y^2+4y+4y+16)=y^2-4y-4y+16

x^2+y^2+8y+16=y^2-8y+16

x^2+16y^2=0

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