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4 years ago

5х – 4у = 90 3х + y = — 56 how do i solve this using elimination?

Mathematics

1 answer:

sweet-ann [11.9K]4 years ago

7 0

Answer:

x=-7.88

y=-32.35

the point answer would be (-7.88 , -32.35)

Step-by-step explanation:

First step is to multiply 3x+y=-56 by 4 and you get 12x+4y=-224

Then add each equation together to eliminate y from each equation. You get 17x=-134

Then find divide that equation by 17. You would get x=-7.88

Then plug -7.88 into one of the original equations for x. 5(-7.88)-4y=90 And from that you get -39.4-4y=90

Then isolate the y variable. You would get -4y=129.4

Then divide by -4 and get y=-32.35

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Answer:

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Step-by-step explanation:

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dV = (∂V/∂H)*dH + (∂V/∂D)*dD

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if we divide by the volume V

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Ev= Eh + 2*Ed

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