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Brums [2.3K]
3 years ago
7

Help me with this pleaseee

Mathematics
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

option c

Step-by-step explanation:

<u>Volume = Length * Width * Height </u>

this is a pretty easy problem cuz all u need to do is find which one of the options has a product of 729.

option a) 7 * 8 * 12

well 7 * 8 * 12 equals 672, so that cannot be the box

option b) 8*9*11

8*9*11 = 792. cant be the box cuz 792 does not equal 729

option c) 9*9*9

9*9*9=729

option c is the box cuz 729 = 729

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Solve the following equation: 8 - 9x = 27.
bearhunter [10]

The given equation is

8-9x=27

To solve for x, we have to subtract 8 to both sides

8-9x-9 = 27-8 \\ -9x = 19

Now we need to get rid of -9 from the left side, and for that we do division

\frac{-9x}{-9} = \frac{19}{-9}

x = - \frac{19}{9}

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Inessa05 [86]
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Have a good day! :D
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Implicit differentiation of 1/x +1/y=5 y(4)= 4/19<br> y'(4)=?
Aneli [31]
\frac{1}{x} +\frac{1}{y} = 5\\\\x^{-1}+y^{-1}=5\\

Above, I changed the fraction form of x and y into exponential form so it is easier to see the differentiation. Now, we can differentiate:

-1x^{-2}+-1y^{-2}\frac{dy}{dx}=5\\\\\frac{-1}{x^2}-\frac{1}{y^2}\frac{dy}{dx}=5\\\\-\frac{1}{y^2}\frac{dy}{dx}=5+\frac{1}{x^2}\\\\\frac{dy}{dx}=-5y^2-\frac{y^2}{x^2}

Now that we have dy/dx, we can plug in the x, which is 4, and the y, which is 4/19. We know these values of x and y because your question stated y(4) = 4/19.

\frac{dy}{dx}=-5(\frac{4}{19})^2-\frac{(\frac{4}{19})^2}{(4)^2}\\\\\frac{dy}{dx}=-5(\frac{16}{361})-\frac{(\frac{16}{361})}{16}\\\\\frac{dy}{dx}=\frac{-80}{361}-\frac{1}{361}\\\\\frac{dy}{dx}=\frac{-81}{361}
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4 years ago
Which expression is equivalent to 2(x -1)+x
olchik [2.2K]

\huge\text{Hey there!}

\huge\textbf{Question reads....}

\large\text{Which expression is equivalent to 2(x - 1) + x?}

\huge\textbf{Step by step to find your result}

\large\textbf{First you have to DISTRIBUTE 2 WITHIN the}\\\large\textbf{PARENTHESES}

\large\text{2(x - 1) + x}\\\rightarrow\large\text{2(x) + 2(-1) + x}\\\rightarrow\large\text{2x - 2 + x}\\\rightarrow\large\text{2x - 2 + 1x}\\\rightarrow\large\textbf{COMBINE the LIKE TERMS}\leftarrow\\\rightarrow\large\text{(2x + 1x) - (2)}\\\rightarrow\large\text{3x - 2}

\huge\textbf{FINALLY WE HAVE YOUR RESULT}

\huge\boxed{\textsf{Therefore, your answer is: }}}\\\huge\boxed{\mathsf{Option\ B. \ 3x - 2}}\huge\checkmark

\huge\text{Good luck on your assignment \& enjoy }\\\huge\text{your day!}

<h2>~\frak{Amphitrite1040:)}</h2>
5 0
2 years ago
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