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3 years ago

What is the equation of a parabola with a directrix x = 8 and focus (-8,0)

1 answer:

7 0

From the given information, the parabola is a sideways parabola facing left with vertex at the origin.
Required equation is (y - 0)^2 = 4p(x - 0)
y^2 = 4px

But 0 + p = -8 => p = -8

Therefore, required equation is y^2 = 4(-8)x
y^2 = -32x

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A rectangle has an area of 20 square units what can be said if it's height and width

Butoxors [25]

The height could be 2 and the width 10 or the height could be 10 and the width could be 2.

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2 years ago

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Adam has 3 meters of fabric. He plans to cut the fabric into pieces that are ¼ meter long. How many pieces of fabric will Adam h

pickupchik [31]

Answer:

12 pieces of fabric

Step-by-step explanation:

3 / 0.25 = 12

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3 years ago

Solve inequality: -6x < 36

7nadin3 [17]

Answer:

x>−6

Step-by-step explanation:

-6x<36

Multiply both sides by -1. ( reverse the inequality )

(-6x) (-1) > 36 (-1)

Simplify

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Divide both sides by 6

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Simplify

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3 years ago

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Step-by-step explanation:

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3 years ago

Given the choice between doing an oral and written report ,18 of the 28 students chose to do an oral report find the ratio of wr

kari74 [83]

Answer:

5:9

Step-by-step explanation:

So since 18 chose to do oral report, that means (28-18) or 10 students decided to do a written report.

To find the written to oral report ration, we need to find for each student that did a written report, how many did an oral report? We can express this as a fraction and simplify to get the simplified ratio. So the the written will be the numerator and the oral will be the denominator: 10/18, to simplify this simply divide both sides by 2, to get 5/9 which gives us the simplified ratio of 5:9 meaning that for every 5 students who decided to do a written report 9 students decided to do an oral report.

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1 year ago