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nika2105 [10]
3 years ago
13

Find the cube root of 8/125

Mathematics
1 answer:
mel-nik [20]3 years ago
6 0

Answer:

0.016

Step-by-step explanation:

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3 years ago
-x=-y+2 and 3y+4=2x solve using matrices
MissTica

\begin{cases}-x=-y+2\\3y+4=2x\end{cases}\implies\begin{cases}x-y=-2\\2x-3y=4\end{cases}

In matrix form, this is

\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-2\\4\end{bmatrix}

The coefficient matrix has determinant

\begin{vmatrix}1&-1\\2&-3\end{vmatrix}=-3+2=-1\neq0

so it has an inverse, which is

\begin{bmatrix}1&-1\\2&-3\end{bmatrix}^{-1}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}

Multiply both sides by the inverse matrix:

\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}-2\\4\end{bmatrix}

\implies\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-10\\-8\end{bmatrix}

so that x=-10 and y=-8.

8 0
3 years ago
Area of a regular heptagon
Allushta [10]

Answer:

32.71

Step-by-step explanation:

32xcot(\frac{108°}{7} \\) = 32.70521

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The street fair charges an admission price of $5 per person. In the first hour, one gate admitted 10 people. In the second hour,
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Answer:

Step-by-step explanation:

a

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3 years ago
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I think the answer to your question is 11.11 I hope this helps
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3 years ago
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