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2 years ago

Please I need help

Mathematics

2 answers:

Dimas [21]2 years ago

8 0

Answer:

Step-by-step explanation:

The directrix is a vertical line, so the parabola is horizontal. The focus lies to the left of the directrix, so the parabola opens to the left.

For a left-opening parabola:

x = a(y-k)²+h,

a < 0,

vertex (h,k)

focal length p = 1/|4a|

focus (h-p, k)

directrix: x=h+p

Apply your data

focus (1,-4)

directrix x=2

vertex (1.5,-4).

focal length p = 0.5

a = -1/|4p| = -½

x = -½(y-2)²+ ½

masha68 [24]2 years ago

4 0

Answer:

x= -(y+4)^2/2 +3/2 is the correct answer.

Step-by-step explanation:

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Maksim231197 [3]

B option is right I think.

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3 years ago

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WARRIOR [948]

(B)

Step-by-step explanation:

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Greeley [361]

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2 years ago

HELP ASAP:

tekilochka [14]

Answer:

Here's how I would do it.

Step-by-step explanation:

If two triangles are similar, corresponding sides are in the same ratio.

We know the measures of b and a, so we can calculate the ratio b/a.

d and b are in the same ratio, so

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kap26 [50]

Answer:

hfrvnuobfchiucvrh

Step-by-step explanation:

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