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3 years ago

Solve algebraically 8x + 10y = -4 -4x = 2 + 5y

Mathematics

1 answer:

Rufina [12.5K]3 years ago

8 0

The answer to the first one is:

x=-5/4y+-1/2. Why?

In the equation 8x+10y=-4, you subtract 10y form each side which leaves you with 8x=-10y-4. Right? Then you divide each side by 8 which gives you the answer

The answer to the second one is the same answer to the first problem. Why? Because you can already divide each side which gives you x=-5/4y+-1/2.

Hope this helps :^)

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Answer:

Option A

Step-by-step explanation:

The complete question is shown in the attachment.

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2 years ago

The length of a rectangle is 4 centimeters more than twice its width of the perimeter of the rectangle is 86centimeters find the

lana66690 [7]

Answer:

$Width= 13 cm$

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Step-by-step explanation:

Let the length of the rectangle be 'L'

And the width of the rectangle be 'W'

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According to the statement:

$Length= 2*Width+4\\L=2W+4$

Perimeter of a rectangle= 2(Length+Width)

$86=2(2W+4+W)\\86/2=3W+4\\43=3W+4\\3W=43-4\\3W=39\\W=39/3\\W=13 cm\\\\Length(L)=2W+4\\=2(13)+4=26+4=30 cm\\Length=30 cm$

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2 years ago

If 4x²+ y²= 40 and xy = 6 , find the value of (2x − y).

ziro4ka [17]

answer is 2x+y=±8

hopes this helps u

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2 years ago

Read 2 more answers

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2 years ago