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Anika [276]
3 years ago
15

An architect is sketching a blueprint of a patio for a new fence. On the blueprint, C is the midpoint of segment AD. Point B is

the midpoint of segment AC. If BC = 8 feet, what is the length of AD?
Mathematics
1 answer:
Gre4nikov [31]3 years ago
4 0

Answer:

<u><em>The length of AD is 32 feet</em></u>

Step-by-step explanation:

<u>Proportional distances </u>

When distances are proportions of others, we can express all of them as relative fractions until we reach some known distance and solve for the desired length

Let's call x the length of AD. Given C is the midpoint of AD, then

\displaystyle AC=CD=\frac{x}{2}

Given B is the midpoint of AC, then

\displaystyle AB=BC=\frac{AC}{2}=\frac{x}{4}

If we know BC=8 feet

\displaystyle \frac{x}{4}=8\ feet

\displaystyle x=32\ feet

The length of AD is 32 feet

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Answer:

-6 < k < 2

Step-by-step explanation:

Given

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Required

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The general quadratic equation is:

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Subtract y = x^2 - 2x and y =kx -4

y - y = x^2 - 2x - kx +4

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Factorize:

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Rewrite as:

x^2 +x(-2 - k) +4=0

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b^2 - 4ac > 0

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(-2-k)^2 -4*1*4>0

(-2-k)^2 -16>0

Expand

4 +4k+k^2-16>0

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Factorize

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k < 2 or k >-6

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