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3 years ago

Which is the focus of a parabola with equation y^2=-12x?

Mathematics

2 answers:

solniwko [45]3 years ago

7 0

P is 3 .and its horizontal <span>parabola it's focus is (a-p,b) so (-3,0)</span>

Ksenya-84 [330]3 years ago

6 0

Answer:

Focus of the given parabola is (-3,0)

Step-by-step explanation:

Given equation of parabola is:

y² = -12x

Standard equation of parabola is :

y² = 4px

Parabola opens right or left.

Focus of this parabola is (p,0)

y² = -12x is opens left.

y² = 4(-3)x

Here value of p = -3

So, the focus of given parabola is : (-3,0)

That's the final answer.

I hope its help you.

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vlabodo [156]

Answer:

$x=55$

Step-by-step explanation:

Corresponding angles of two parallel lines are always equal. The angle on "top" of $2x+6$ corresponds with the angle marked as $x+9$ . Therefore, its measure must also be $x+9$ .

Since these two angles form one side of a line which has 180 degrees, we have the following equation:

$2x+6+x+9=180$

Combine like terms:

$3x+15=180$

Subtract 15 from both sides:

$3x=165$

Divide both sides by 3:

$x=\frac{165}{3}=\boxed{55}$

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2 years ago

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There were 200 melons in a box and they were distributed to 3 children in the ratio of 4:3:3. The first child sold the melons at

Elena L [17]

Answer:

$460

Step-by-step explanation:

let the number of melons be x

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amount made by 1st child = 80 × $2 = 160$

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