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2 years ago

Please help me with this

Mathematics

1 answer:

Nady [450]2 years ago

3 0

Answer:

x = 5

Step-by-step explanation:

Given

- 3x - 2 = - 17 ( add 2 to both sides )

- 3x = - 15 ( divide both sides by - 3 )

x = 5

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Step by step solution :

Step 1 :

Equation at the end of step 1 :

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Step-by-step explanation:

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3 years ago

A square has an area of 81x square cm. What is the perimeter of the square ?

Fudgin [204]

Answer:

The perimeter of the square is $36\sqrt{x}\ cm$

Step-by-step explanation:

step 1

Find the length side of the square

we know that

The area of a square is equal to

$A=b^{2}$

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we have

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substitute and solve for b

$81x=b^{2}$

square root both sides

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step 2

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3 years ago

I dont know…………………..

Marysya12 [62]

Answer:

$-3\sqrt{3}$

Step-by-step explanation:

$-4\sqrt{12}+\sqrt{75}$

$-4\sqrt{4*3}+\sqrt{25*3}$

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$-8\sqrt{3}+5\sqrt{3}$

$-3\sqrt{3}$

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2 years ago