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katrin2010 [14]
3 years ago
9

Which line is a directrix of the hyperbola? A B C D

Mathematics
1 answer:
hoa [83]3 years ago
3 0

Answer:

The hyperbola has two directrices, one for each side of the figure. You can see the hyperbola as two parabolas in one equation. So, as parabolas have directrix, hyperbolas does too.

The directrices are perpendicular to the major axis. That means if the parabolla is horizontal, then its directrices are vertical, and viceversa.

Therefore, to find the right line that forms the directrix of a hyperbola, you just need to use the directrix that is perpendicular to the major axis.

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How many ways can we pick three distinct integers from {1, 2, ..., 15} such that their sum is divisible by 3?
gogolik [260]

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Clearly from 1 to 15 we can only have the sum 6,9,12 and 15 to be divisible by 3.

Now meaning we have 4! ( 4 factorial) which implies 4x3x2x1= 24 .

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Step-by-step explanation:

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Write the equation of the line that passes through the point P and is
gayaneshka [121]
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2 years ago
Please help me with this math problem, I am lost
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<u>Slope-intercept</u><u> </u><u>form</u><u>:</u>

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