3 years ago

Given: f(x) = 3 - X; g(x) = -2x Find g[f(x)]

Mathematics

1 answer:

OLEGan [10]3 years ago

5 0

Answer:

g[f(x)] = -2(3 - x) = -6 + 2x

Step-by-step explanation:

When we substitute the function f(x) for x in g(x) = -2x, we get the composition g[f(x)]:

g[f(x)] = -2(3 - x) = -6 + 2x

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Factorize completely <br> 81k^2 - m^2

Genrish500 [490]

81k^2 - m^2 factors to

(9k + m)(9k - m)

Prove this by FOILing.

First - 81k^2

Outer - (-9km)

Inner - 9km

Last - (-m^2)

Put it into equation form

81k^2 - 9km + 9km - m^2

And combine terms to get the original equation,

81k^2 - m^2.

⭐ Answered by Hyperrspace (Ace) ⭐

⭐ Brainliest would be appreciated, I'm trying to reach genius! ⭐

⭐ If you have questions, leave a comment, I'm happy to help! ⭐

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what is the density of a sheet of aluminum that has a volume of 328.4 cubic centimeters and a mass of 780 grams

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Answer:

$\large\boxed{density=\dfrac{1950}{821}\ \dfrac{g}{cm^3}\approx2.375\ \dfrac{g}{cm^3}}$

Step-by-step explanation:

$density=\dfrac{mass}{volume}\\\\\text{We have}\\\\mass=780\ g\\volume=328.4\ cm^3\\\\\text{Substitute:}\\\\density=\dfrac{780g}{328.4\ cm^3}=\dfrac{780\cdot10}{328.4\cdot10}\ \dfrac{g}{cm^3}=\dfrac{7800}{3284}\ \dfrac{g}{cm^3}=\dfrac{7800:4}{3284:4}\ \dfrac{g}{cm^3}\\\\=\dfrac{1950}{821}\ \dfrac{g}{cm^3}$

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3 years ago