3 years ago

Pls help me with this

Mathematics

2 answers:

labwork [276]3 years ago

7 0

Answer:

5/4

Step-by-step explanation:

The constant of proportionality is the coefficient of x: 5/4.

ser-zykov [4K]3 years ago

4 0

Answer:

x:5/4

Step-by-step explanation:

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If 3x - 2y = 9 , 27x³- 8y³= 1377 , prove that xy = 4 plzz answer this question...

solniwko [45]

Step-by-step explanation:

Here we are given that , the Value of

$3x - 2y = 9$
$27x^3 - 8y^3 = 1377$

And we need to find the prove that ,

$xy = 4$

We know a identity as ,

$(a-b)^3 = a^3-b^3-3ab(a-b)$

On cubing both sides of the given equation,

$(3x-2y)^3 = 9^3$

Simplify and then substitute ,

$27x^3-8y^3 -3(3x)(2y)(3x-2y ) = 729$

$1377 - 18xy (9) = 729$

$162xy = 1377-729$

$xy =\dfrac{648}{162}$

$xy = 4$

Hence Proved !

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3 years ago

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I am pretty sure a is the awnser

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Plz help I need help

Simora [160]

Answer:

a. 1/4

Step-by-step explanation:

no need for explanation

its basic

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2 years ago

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Final tell his mother that the secret number he is thinking of is divisible by 18 and tells this father that is divisible by 12.

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a/2 would be the only possible answer

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