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2 years ago

8

What is the solution to 3|x + 3| = 12?

1 answer:

Neporo4naja [7]2 years ago

7 0

Step-by-step explanation:

3(x+3)=12

3x+9=12

3x=12-9

3x=3

x=1

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Answer:

А.The system has two solutions, but only one is viable because the other results in a negative width.

Step-by-step explanation:

Given

Let:

$L_A \to$ length of play area A

$W_A \to$ width of play area A

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$W_B \to$ width of play area B

$x \to$ Area of A

$y \to$ Area of B

From the question, we have the following:

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This gives:

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Open bracket

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The area of B is:

$y = L_B * W_B$

$y = (2 + 3W_B) * ( 2 + W_A)$

Substitute: $W_B = 2 + W_A$

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Open brackets

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Expand

$y = 16 + 8W_A + 6W_A + 3W_A^2$

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We have that:

$x = y$

This gives:

$W_A + 4W_A^2 = 16 + 14W_A + 3W_A^2$

Collect like terms

$4W_A^2 - 3W_A^2 + W_A -14W_A - 16 =0$

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Read 2 more answers