Mathematics: Perform the operation. (-4x^2+ 3x + 3) - (4x^2 +9)

Perform the operation. (-4x^2+ 3x + 3) - (4x^2 - id42334297453920, donaji1024perez

yhbgvfcd331

01.02.2022

-8x^2+3x-6

Step-by-step explanation:

(-4x^2+ 3x + 3) - (4x^2 +9)

Distribute the minus sign

(-4x^2+ 3x + 3) - 4x^2 -9

Combine like terms

-8x^2+3x-6

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ijohnh14

15.03.2021

$\large\boxed{\large\boxed{volume=1.5cm^3}}$

Explanation:

Translation:

What volume will 12g of iron occupy?

Solution

Iron is a solid substance at room temperature. You can find the volume of solids (and of not solids) using the density.

$Density=\dfrac{mass}{volume}$

You can obtaindthe density of most pure substances in the internet. The density of iron at room temperature is 7.874 g/cm³.

Thus, substituting in the formula, you get:

$7.874g/cm^3=\dfrac{12g}{volume}\\ \\ \\ volume=\dfrac{12g}{7.874g/cm^3}\\ \\ \\ volume=1.5cm^3$

The answer is rounded to two significant figures because the input, 12g, has two significant figures.

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