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kykrilka [37]
3 years ago
10

Pleaseeee help I need a answer fast

Mathematics
1 answer:
andre [41]3 years ago
6 0

Answer:

300

Step-by-step explanation:

im smart

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y= 8

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Write a decimal that represents 8×100+4×1+5×1√100+3×1√1000 help please
Alborosie

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3 years ago
Two vertical poles of heights 60 ft and 80 ft stand on level ground, with their bases 100 ft apart. A cable that is stretched fr
Andreyy89

Answer:

Step-by-step explanation:

Given

height of two Poles are 60 and 80 ft

Distance between them is 100 ft

Let x be the distance of Pole of ht 80 ft from Point of stretch

thus length of rope is given by

L=L_1+L_2

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L=\sqrt{80^2+x^2}+\sqrt{60^2+(100-x)^2}

differentiate w.r.t x we get

\frac{\mathrm{d} L}{\mathrm{d} x}=\frac{2x}{2\sqrt{80^2+x^2}}-\frac{2\left ( 100-x\right )}{\sqrt{60^2+\left ( 100-2x\right )^2}}

Put \frac{\mathrm{d} L}{\mathrm{d} x}=0 to get minimum value

\frac{2x}{2\sqrt{80^2+x^2}}=\frac{2\left ( 100-x\right )}{\sqrt{60^2+\left ( 100-2x\right )^2}}

squaring

x^2\left ( (100-x)^2+60^2\right )=(100-x)^2(80^2+x^2)

Rearranging

28x^2-1800x+640000=0

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thus L_1=98.312 ft

L_2=73.73 ft

L=172.04 ft  

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3 years ago
Please help its from the lines and angles chapter
Murrr4er [49]

This is the answer of this question

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