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Svet_ta [14]
3 years ago
11

If y varies inversely as x^2 and y = 3 when x = 18, what is y when x = 3?

Mathematics
2 answers:
Dominik [7]3 years ago
7 0
Y*x^2=k
y=3, x=18 ⇒ 3*18^2=3*324=972=k
x=3, 972=y*x^2=y*9
y=972/9
y=108
Mumz [18]3 years ago
7 0

Answer:

The correct answer to this question is 108.

Step-by-step explanation:

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The best and most correct answer among the choices provided by your question is the second choice or letter B "20".

The current area is 120(80)=9600 and he want to expand it by 4400 so that the new area will be 9600+4400=14000 

14000=(120+x)(80+x) 

14000=9600+200x+x^2 

x^2+200x-4400=0 

x^2-20x+220x-4400=0 

x(x-20)+220(x-20)=0 

(x+220)(x-20)=0, since x is an increase it must be greater than zero so 

x=20ft 

(120+20)(80+20)=14000ft^2


I hope my answer has come to your help. Thank you for posting your question here in Brainly.

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3 years ago
The width of a rectangular rug is 6 feet if the perimeter is 24 feet what is the area of the rug?
babymother [125]

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You would subtract the number you get from the perimeter.

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