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2 years ago

Given that x and y vary inversely and that y is 8 when x is 2, what is the constant of variation, k?

Mathematics

1 answer:

Shtirlitz [24]2 years ago

4 0

Answer:

Step-by-step explanation:

the equation is x = k / y

therefore k = x* y

k = 2*8

k= 16

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Step-by-step explanation:

17,20,23,26,29,31,34,37,40,43,46,49,51,54,57,60,63,66,69,71,74,77,80,83,86,

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2 years ago

Round 31.320 to the nearest hundred

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Answer:

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31.32

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2 years ago

Which expression has a value of 3?

Marina86 [1]

Step-by-step explanation:

3(4 *to the power of 2* - 3*to the power of 2*)

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6 0

1 year ago

A conical container can hold 120π cubic centimeters of water. The diameter of the base of the container is 12 centimeters.

nignag [31]

Answer:

A. 10cm

B. 8 times

Step-by-step explanation:

The question is on volume of a conical container

Volume of a cone= $\pi r^{2} h/3$

where r is the radius of base and h is the height of the cone

Given diameter= 12 cm, thus radius r=12/2 =6 cm

$v=\pi r^2h/3 \\120\pi =\pi *6*6*h/3\\120\pi =12\pi h\\10=h$

h=10 cm

If height and diameter were doubled

New height = 2×10 =20 cm

New diameter = 2×12 = 24, r=12 cm

volume = $v=\pi r^2h/3\\v=\pi *12*12*20/3\\v=960\pi$

To find the number of times we divide new volume with the old volume

$N= 960\pi /120\pi \\\\N= 8$

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2 years ago

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