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mezya [45]
2 years ago
7

I’m gonna need a little help on this

Mathematics
1 answer:
Scrat [10]2 years ago
7 0

Answer:

sorry I don't know just ask to any one

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Two poles are connected by a wire that is also connected to the ground. The first pole is 18 ft tall and the second pole is 24 f
9966 [12]

Answer:

  72 feet from the shorter pole

Step-by-step explanation:

The anchor point that minimizes the total wire length is one that divides the distance between the poles in the same proportion as the pole heights. That is, the two created triangles will be similar.

The shorter pole height as a fraction of the total pole height is ...

  18/(18+24) = 3/7

so the anchor distance from the shorter pole as a fraction of the total distance between poles will be the same:

  d/168 = 3/7

  d = 168·(3/7) = 72

The wire should be anchored 72 feet from the 18 ft pole.

_____

<em>Comment on the problem</em>

This is equivalent to asking, "where do I place a mirror on the ground so I can see the top of the other pole by looking in the mirror from the top of one pole?" Such a question is answered by reflecting one pole across the plane of the ground and drawing a straight line from its image location to the top of the other pole. Where the line intersects the plane of the ground is where the mirror (or anchor point) should be placed. The "similar triangle" description above is essentially the same approach.

__

Alternatively, you can write an equation for the length (L) of the wire as a function of the location of the anchor point:

  L = √(18²+x²) + √(24² +(168-x)²)

and then differentiate with respect to x and find the value that makes the derivative zero. That seems much more complicated and error-prone, but it gives the same answer.

7 0
3 years ago
Show work please!...
Leni [432]

Answer:what goes around comes around

Step-by-step explanation:

"i need points too thanks"

7 0
2 years ago
If pq=3 and pq+rs=5, then 3+rs=5 is an example of the _________.
Mrrafil [7]
<span>This is an example of the substitution property of equality, meaning that if pq = 3, you may substitute 3 for pq in another related equation. So if pq+rs=5 is true, then 3+rs=5 is true as well.</span>
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3 years ago
luis is making two batches of muffins for a school picnic. one batch of muffins uses 1/3 cup of oats and 1/2 cup of flour. how m
Llana [10]
1 2/12 is the answer because you multiply the fraction by the other detonator
5 0
3 years ago
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Which represents all the values of x that make the rational expression 2x-4 over x-5 undefined?
julsineya [31]
X=5 because the denominator can never equal zero or it will be undefined. and 5-5=0
7 0
3 years ago
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