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7nadin3 [17]
3 years ago
12

Which is the directrix of a parabola with equation x2 = 8y?

Mathematics
1 answer:
olga_2 [115]3 years ago
4 0

Answer:

Y=-2

Step-by-step explanation:

You would use the vertex form to find the directrix

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The gcf of two numbers less than or equal to 12 is 2. Their LCM is 20.What are the numbers?
bixtya [17]

We know:

LCM(a,\ b)=\dfrac{ab}{GCF(a,\ b)}

We have

GCF(a,\ b)=2,\ LCM(a,\ b)=20,\ a\leq12,\ b\leq12

Substitute:

20=\dfrac{ab}{2}\qquad|\cdot2\\\\ab=40

40=1\cdot40=2\cdot20=4\cdot10=5\cdot8

Only 4 and 10 meet the requirements of the question.

--------------------------------------------------------------------

40 and 1 NOT, because 40 > 12

20 and 2 NOT, because 20 > 12

5 and 8 NOT because GCF(5, 8) = 1

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Sam stores manure for his farm in a rectangular box. The length of the box is 7 feet, The width is 9 inches, and the height is 6
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Answer:

8 different choices

Step-by-step explanation:

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Expand 3(x+ 2.3) <br> Expand 1/3(9x-12)
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Answer:

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being 6.9.

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